diff --git a/Cargo.lock b/Cargo.lock
index 55924b187..e751753f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1407,7 +1407,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "test_declare_class"
+name = "test_define_class"
 version = "0.1.0"
 dependencies = [
  "objc2",
diff --git a/crates/objc2/CHANGELOG.md b/crates/objc2/CHANGELOG.md
index c1abb805e..884ba63fd 100644
--- a/crates/objc2/CHANGELOG.md
+++ b/crates/objc2/CHANGELOG.md
@@ -29,14 +29,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Implement `Message` for `AnyClass` and `AnyProtocol`.
 * Allow `AnyClass` and `AnyProtocol` to be converted to `AnyObject` (both of
   these can act as objects).
-* Classes created using `declare_class!` now implement `Send` and `Sync` when
+* Classes created using `define_class!` now implement `Send` and `Sync` when
   subclassing `NSObject`.
 
 ### Changed
-* **BREAKING**: Changed the syntax of `declare_class!` to be more succinct:
+* **BREAKING**: Renamed `declare_class!` to `define_class!`, and changed the
+  syntax to be more succinct:
 
   ```rust
   // Before
+  use objc2::mutability::InteriorMutable;
+  use objc2::runtime::NSObject;
+  use objc2::{declare_class, ClassType, DeclaredClass};
+
+  struct MyIvars;
+
   declare_class!(
       struct MyObject;
 
@@ -54,7 +61,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   );
 
   // After
-  declare_class!(
+  use objc2::runtime::NSObject;
+  use objc2::define_class;
+
+  struct MyIvars;
+
+  define_class!(
       #[unsafe(super(NSObject))]
       #[name = "MyObject"]
       #[ivars = MyIvars]
@@ -69,6 +81,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * **BREAKING**: Changed the syntax of `extern_class!` to be more succinct:
   ```rust
   // Before
+  use objc2::mutability::MainThreadOnly;
+  use objc2::runtime::NSObject;
+  use objc2::{extern_class, ClassType};
+
   extern_class!(
       #[derive(PartialEq, Eq, Hash, Debug)]
       struct MyClass;
@@ -81,6 +97,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   );
 
   // After
+  use objc2::runtime::NSObject;
+  use objc2::{extern_class, MainThreadOnly};
+
   extern_class!(
       #[unsafe(super(NSObject))]
       #[thread_kind = MainThreadOnly]
@@ -126,6 +145,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Deprecated `NSObjectProtocol::is_kind_of`, use `isKindOfClass` or the new
   `AnyObject::downcast_ref` method instead.
 * Deprecated `Retained::cast`, this has been renamed to `Retained::cast_unchecked`.
+* Renamed `DeclaredClass` to `DefinedClass`.
 
 ### Removed
 * **BREAKING**: Removed the `ffi::SEL` and `ffi::objc_selector` types. Use
diff --git a/crates/objc2/examples/class_with_lifetime.rs b/crates/objc2/examples/class_with_lifetime.rs
index dfc83d90b..a93a3d215 100644
--- a/crates/objc2/examples/class_with_lifetime.rs
+++ b/crates/objc2/examples/class_with_lifetime.rs
@@ -1,5 +1,5 @@
-//! Note: We can't use the `declare_class!` macro for this, it doesn't support
-//! such use-cases (yet). Instead, we'll declare the class manually.
+//! Note: We can't use the `define_class!` macro for this, it doesn't support
+//! such use-cases (yet). Instead, we'll create it manually.
 #![deny(unsafe_op_in_unsafe_fn)]
 use std::cell::Cell;
 use std::marker::PhantomData;
diff --git a/crates/objc2/src/__macro_helpers/common_selectors.rs b/crates/objc2/src/__macro_helpers/common_selectors.rs
index 978c88018..c1766e771 100644
--- a/crates/objc2/src/__macro_helpers/common_selectors.rs
+++ b/crates/objc2/src/__macro_helpers/common_selectors.rs
@@ -44,10 +44,10 @@ fn cxx_construct_sel() -> Sel {
 /// undocumented in clang - but since the selector is emitted into the final
 /// binary, it is fine to rely on it being used.
 ///
-/// Unfortunately though, this only works if the class has been declared
+/// Unfortunately though, this only works if the class has been defined
 /// statically, since in that case a flag is set to inform the runtime that it
 /// needs to run destructors. So unfortunately we can't use this on
-/// dynamically declared classes.
+/// dynamically defined classes.
 ///
 ///
 /// # ABI
diff --git a/crates/objc2/src/__macro_helpers/convert.rs b/crates/objc2/src/__macro_helpers/convert.rs
index 29b63e3cd..945910737 100644
--- a/crates/objc2/src/__macro_helpers/convert.rs
+++ b/crates/objc2/src/__macro_helpers/convert.rs
@@ -25,7 +25,7 @@ pub trait ConvertArgument: argument_private::Sealed {
     type __StoredBeforeMessage: Sized;
 
     #[doc(hidden)]
-    fn __from_declared_param(inner: Self::__Inner) -> Self;
+    fn __from_defined_param(inner: Self::__Inner) -> Self;
 
     #[doc(hidden)]
     fn __into_argument(self) -> (Self::__Inner, Self::__StoredBeforeMessage);
@@ -48,7 +48,7 @@ impl<T: EncodeArgument> ConvertArgument for T {
     type __StoredBeforeMessage = ();
 
     #[inline]
-    fn __from_declared_param(inner: Self::__Inner) -> Self {
+    fn __from_defined_param(inner: Self::__Inner) -> Self {
         inner
     }
 
@@ -65,7 +65,7 @@ impl ConvertArgument for bool {
     type __StoredBeforeMessage = ();
 
     #[inline]
-    fn __from_declared_param(inner: Self::__Inner) -> Self {
+    fn __from_defined_param(inner: Self::__Inner) -> Self {
         inner.as_bool()
     }
 
@@ -86,7 +86,7 @@ pub trait ConvertReturn: return_private::Sealed {
     type __Inner: EncodeReturn;
 
     #[doc(hidden)]
-    fn __into_declared_return(self) -> Self::__Inner;
+    fn __into_defined_return(self) -> Self::__Inner;
 
     #[doc(hidden)]
     fn __from_return(inner: Self::__Inner) -> Self;
@@ -97,7 +97,7 @@ impl<T: EncodeReturn> ConvertReturn for T {
     type __Inner = Self;
 
     #[inline]
-    fn __into_declared_return(self) -> Self::__Inner {
+    fn __into_defined_return(self) -> Self::__Inner {
         self
     }
 
@@ -112,7 +112,7 @@ impl ConvertReturn for bool {
     type __Inner = Bool;
 
     #[inline]
-    fn __into_declared_return(self) -> Self::__Inner {
+    fn __into_defined_return(self) -> Self::__Inner {
         Bool::new(self)
     }
 
@@ -295,7 +295,7 @@ mod tests {
             TypeId::of::<<i32 as ConvertArgument>::__Inner>(),
             TypeId::of::<i32>()
         );
-        assert_eq!(<i32 as ConvertArgument>::__from_declared_param(42), 42);
+        assert_eq!(<i32 as ConvertArgument>::__from_defined_param(42), 42);
         assert_eq!(ConvertArgument::__into_argument(42i32).0, 42);
     }
 
@@ -305,21 +305,21 @@ mod tests {
             TypeId::of::<<i8 as ConvertArgument>::__Inner>(),
             TypeId::of::<i8>()
         );
-        assert_eq!(<i8 as ConvertArgument>::__from_declared_param(-3), -3);
+        assert_eq!(<i8 as ConvertArgument>::__from_defined_param(-3), -3);
         assert_eq!(ConvertArgument::__into_argument(-3i32).0, -3);
     }
 
     #[test]
     fn convert_bool() {
-        assert!(!<bool as ConvertArgument>::__from_declared_param(Bool::NO));
-        assert!(<bool as ConvertArgument>::__from_declared_param(Bool::YES));
+        assert!(!<bool as ConvertArgument>::__from_defined_param(Bool::NO));
+        assert!(<bool as ConvertArgument>::__from_defined_param(Bool::YES));
         assert!(!<bool as ConvertReturn>::__from_return(Bool::NO));
         assert!(<bool as ConvertReturn>::__from_return(Bool::YES));
 
         assert!(!ConvertArgument::__into_argument(false).0.as_bool());
         assert!(ConvertArgument::__into_argument(true).0.as_bool());
-        assert!(!ConvertReturn::__into_declared_return(false).as_bool());
-        assert!(ConvertReturn::__into_declared_return(true).as_bool());
+        assert!(!ConvertReturn::__into_defined_return(false).as_bool());
+        assert!(ConvertReturn::__into_defined_return(true).as_bool());
 
         #[cfg(all(target_vendor = "apple", target_os = "macos", target_arch = "x86_64"))]
         assert_eq!(
diff --git a/crates/objc2/src/__macro_helpers/declare_class.rs b/crates/objc2/src/__macro_helpers/define_class.rs
similarity index 96%
rename from crates/objc2/src/__macro_helpers/declare_class.rs
rename to crates/objc2/src/__macro_helpers/define_class.rs
index 8de7e28ba..d417d1e1d 100644
--- a/crates/objc2/src/__macro_helpers/declare_class.rs
+++ b/crates/objc2/src/__macro_helpers/define_class.rs
@@ -13,12 +13,12 @@ use crate::runtime::{
 };
 #[cfg(debug_assertions)]
 use crate::runtime::{AnyProtocol, MethodDescription};
-use crate::{AllocAnyThread, ClassType, DeclaredClass, Message, ProtocolType};
+use crate::{AllocAnyThread, ClassType, DefinedClass, Message, ProtocolType};
 
-use super::declared_ivars::{register_with_ivars, setup_dealloc};
+use super::defined_ivars::{register_with_ivars, setup_dealloc};
 use super::{Copy, Init, MaybeUnwrap, MutableCopy, New, Other};
 
-/// Helper for determining auto traits of declared classes.
+/// Helper for determining auto traits of defined classes.
 ///
 /// This will contain either `dyn AllocAnyThread` or `dyn MainThreadOnly`, so
 /// it will have no auto traits by default.
@@ -64,7 +64,7 @@ unsafe impl Encode for RetainedReturnValue {
 }
 
 // One could imagine a different design where we had a method like
-// `fn convert_receiver()`, but that won't work in `declare_class!` since we
+// `fn convert_receiver()`, but that won't work in `define_class!` since we
 // can't actually modify the `self` argument (e.g. `let self = foo(self)` is
 // not allowed).
 //
@@ -143,7 +143,7 @@ where
 
 /// Helper trait for specifying an `Retained<T>` or an `Option<Retained<T>>`.
 ///
-/// (Both of those are valid return types from declare_class! `#[method_id]`).
+/// (Both of those are valid return types from define_class! `#[method_id]`).
 pub trait MaybeOptionRetained: MaybeUnwrap {
     fn consumed_return(self) -> RetainedReturnValue;
     fn autorelease_return(self) -> RetainedReturnValue;
@@ -195,7 +195,7 @@ fn create_builder(name: &str, superclass: &AnyClass) -> ClassBuilder {
     }
 }
 
-impl<T: DeclaredClass> ClassBuilderHelper<T> {
+impl<T: DefinedClass> ClassBuilderHelper<T> {
     #[inline]
     #[track_caller]
     #[allow(clippy::new_without_default)]
@@ -302,7 +302,7 @@ pub struct ClassProtocolMethodsBuilder<'a, T: ?Sized> {
     registered_class_methods: HashSet<Sel>,
 }
 
-impl<T: DeclaredClass> ClassProtocolMethodsBuilder<'_, T> {
+impl<T: DefinedClass> ClassProtocolMethodsBuilder<'_, T> {
     // Addition: This restricts to callee `T`
     #[inline]
     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
diff --git a/crates/objc2/src/__macro_helpers/declared_ivars.rs b/crates/objc2/src/__macro_helpers/defined_ivars.rs
similarity index 94%
rename from crates/objc2/src/__macro_helpers/declared_ivars.rs
rename to crates/objc2/src/__macro_helpers/defined_ivars.rs
index 5cd7126ef..c20c21fd2 100644
--- a/crates/objc2/src/__macro_helpers/declared_ivars.rs
+++ b/crates/objc2/src/__macro_helpers/defined_ivars.rs
@@ -1,4 +1,4 @@
-//! # Supporting code for instance variables on declared classes.
+//! # Supporting code for instance variables on defined classes.
 //!
 //! Adding instance variables to Objective-C classes is fairly simple, it can
 //! be done using `ClassBuilder::add_ivar`.
@@ -14,7 +14,7 @@
 //! following tagged enum:
 //! ```
 //! #[repr(u8)]
-//! enum ActualIvar<T: objc2::DeclaredClass> {
+//! enum ActualIvar<T: objc2::DefinedClass> {
 //!     Allocated = 0,
 //!     PartialInit(T::Ivars),
 //!     Finalized(T::Ivars),
@@ -54,7 +54,7 @@ use core::ptr::{self, NonNull};
 
 use crate::encode::{Encode, Encoding};
 use crate::runtime::{AnyClass, AnyObject, ClassBuilder, MessageReceiver, Sel};
-use crate::{sel, ClassType, DeclaredClass};
+use crate::{sel, ClassType, DefinedClass};
 
 /// A type representing the drop flags that may be set for a type.
 #[repr(u8)]
@@ -82,12 +82,12 @@ unsafe impl Encode for DropFlag {
     const ENCODING: Encoding = u8::ENCODING;
 }
 
-pub trait DeclaredIvarsHelper {
+pub trait DefinedIvarsHelper {
     const HAS_IVARS: bool;
     const HAS_DROP_FLAG: bool;
 }
 
-impl<T: DeclaredClass> DeclaredIvarsHelper for T {
+impl<T: DefinedClass> DefinedIvarsHelper for T {
     /// Only add ivar if we need the runtime to allocate memory for it.
     ///
     /// We can avoid doing so if the type is a zero-sized type (ZST), and the
@@ -112,7 +112,7 @@ impl<T: DeclaredClass> DeclaredIvarsHelper for T {
 /// The pointer must be valid, and the instance variable offset (if it has
 /// any) must have been initialized.
 #[inline]
-unsafe fn ptr_to_ivar<T: ?Sized + DeclaredClass>(ptr: NonNull<T>) -> NonNull<T::Ivars> {
+unsafe fn ptr_to_ivar<T: ?Sized + DefinedClass>(ptr: NonNull<T>) -> NonNull<T::Ivars> {
     // This is called even when there is no ivars, but that's fine, since in
     // that case the ivar is zero-sized, and the offset will be zero, so we
     // can still compute a valid pointer to the ivar.
@@ -120,7 +120,7 @@ unsafe fn ptr_to_ivar<T: ?Sized + DeclaredClass>(ptr: NonNull<T>) -> NonNull<T::
     // debug_assert!(T::HAS_IVARS);
 
     // SAFETY: That an instance variable with the given type exists at the
-    // specified offset is ensured by `DeclaredClass` trait implementor.
+    // specified offset is ensured by `DefinedClass` trait implementor.
     unsafe { AnyObject::ivar_at_offset::<T::Ivars>(ptr.cast(), T::__ivars_offset()) }
 }
 
@@ -130,14 +130,14 @@ unsafe fn ptr_to_ivar<T: ?Sized + DeclaredClass>(ptr: NonNull<T>) -> NonNull<T::
 ///
 /// The pointer must be valid and have an initialized drop flag.
 #[inline]
-unsafe fn ptr_to_drop_flag<T: DeclaredClass>(ptr: NonNull<T>) -> *mut DropFlag {
+unsafe fn ptr_to_drop_flag<T: DefinedClass>(ptr: NonNull<T>) -> *mut DropFlag {
     debug_assert!(T::HAS_DROP_FLAG, "type did not have drop flag");
     // SAFETY: That a drop flag exists at the specified offset is ensured
     // by caller.
     unsafe { AnyObject::ivar_at_offset::<DropFlag>(ptr.cast(), T::__drop_flag_offset()).as_ptr() }
 }
 
-pub(crate) fn setup_dealloc<T: DeclaredClass>(builder: &mut ClassBuilder)
+pub(crate) fn setup_dealloc<T: DefinedClass>(builder: &mut ClassBuilder)
 where
     T::Super: ClassType,
 {
@@ -158,7 +158,7 @@ where
 /// - <https://clang.llvm.org/docs/AutomaticReferenceCounting.html#dealloc>
 /// - <https://developer.apple.com/documentation/objectivec/nsobject/1571947-dealloc>
 /// - <https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmRules.html#//apple_ref/doc/uid/20000994-SW2>
-unsafe extern "C-unwind" fn dealloc<T: DeclaredClass>(this: NonNull<T>, cmd: Sel)
+unsafe extern "C-unwind" fn dealloc<T: DefinedClass>(this: NonNull<T>, cmd: Sel)
 where
     T::Super: ClassType,
 {
@@ -236,7 +236,7 @@ where
 
 /// Register the class, and get the ivar offsets.
 #[inline]
-pub(crate) fn register_with_ivars<T: DeclaredClass>(
+pub(crate) fn register_with_ivars<T: DefinedClass>(
     mut builder: ClassBuilder,
 ) -> (&'static AnyClass, isize, isize) {
     let (ivar_name, drop_flag_name): (Cow<'static, CStr>, Cow<'static, CStr>) = {
@@ -281,7 +281,7 @@ pub(crate) fn register_with_ivars<T: DeclaredClass>(
 
     if T::HAS_DROP_FLAG {
         // TODO: Maybe we can reuse the drop flag when subclassing an already
-        // declared class?
+        // defined class?
         builder.add_ivar::<DropFlag>(&drop_flag_name);
     }
 
@@ -291,7 +291,7 @@ pub(crate) fn register_with_ivars<T: DeclaredClass>(
         // Monomorphized error handling
         // Intentionally not #[track_caller], we expect this error to never occur
         fn get_ivar_failed() -> ! {
-            unreachable!("failed retrieving instance variable on newly declared class")
+            unreachable!("failed retrieving instance variable on newly defined class")
         }
 
         cls.instance_variable(&ivar_name)
@@ -309,7 +309,7 @@ pub(crate) fn register_with_ivars<T: DeclaredClass>(
         // Monomorphized error handling
         // Intentionally not #[track_caller], we expect this error to never occur
         fn get_drop_flag_failed() -> ! {
-            unreachable!("failed retrieving drop flag instance variable on newly declared class")
+            unreachable!("failed retrieving drop flag instance variable on newly defined class")
         }
 
         cls.instance_variable(&drop_flag_name)
@@ -331,7 +331,7 @@ pub(crate) fn register_with_ivars<T: DeclaredClass>(
 /// The pointer must be a valid, newly allocated instance.
 #[inline]
 #[track_caller]
-pub(crate) unsafe fn initialize_ivars<T: DeclaredClass>(ptr: NonNull<T>, val: T::Ivars) {
+pub(crate) unsafe fn initialize_ivars<T: DefinedClass>(ptr: NonNull<T>, val: T::Ivars) {
     // Debug assert the state of the drop flag
     if T::HAS_DROP_FLAG && cfg!(debug_assertions) {
         // SAFETY: Just checked that the drop flag is available.
@@ -371,7 +371,7 @@ pub(crate) unsafe fn initialize_ivars<T: DeclaredClass>(ptr: NonNull<T>, val: T:
 /// have been run).
 #[inline]
 #[track_caller]
-pub(crate) unsafe fn set_finalized<T: DeclaredClass>(ptr: NonNull<T>) {
+pub(crate) unsafe fn set_finalized<T: DefinedClass>(ptr: NonNull<T>) {
     // Debug assert the state of the drop flag
     if T::HAS_DROP_FLAG && cfg!(debug_assertions) {
         // SAFETY: Just checked that the drop flag is available.
@@ -400,7 +400,7 @@ pub(crate) unsafe fn set_finalized<T: DeclaredClass>(ptr: NonNull<T>) {
 /// The pointer must be valid and the instance variables must be initialized.
 #[inline]
 #[track_caller]
-pub(crate) unsafe fn get_initialized_ivar_ptr<T: DeclaredClass>(
+pub(crate) unsafe fn get_initialized_ivar_ptr<T: DefinedClass>(
     ptr: NonNull<T>,
 ) -> NonNull<T::Ivars> {
     // Debug assert the state of the drop flag
@@ -435,10 +435,10 @@ mod tests {
     use super::*;
     use crate::rc::{Allocated, PartialInit, RcTestObject, Retained, ThreadTestData};
     use crate::runtime::NSObject;
-    use crate::{declare_class, msg_send, msg_send_id, AllocAnyThread, Message};
+    use crate::{define_class, msg_send, msg_send_id, AllocAnyThread, Message};
 
     /// Initialize superclasses, but not own class.
-    unsafe fn init_only_superclasses<T: DeclaredClass>(obj: Allocated<T>) -> Retained<T>
+    unsafe fn init_only_superclasses<T: DefinedClass>(obj: Allocated<T>) -> Retained<T>
     where
         T::Super: ClassType,
     {
@@ -446,7 +446,7 @@ mod tests {
     }
 
     /// Initialize, but fail to finalize (which is only done by `msg_send_id!`).
-    unsafe fn init_no_finalize<T: DeclaredClass>(obj: Allocated<T>) -> Retained<T>
+    unsafe fn init_no_finalize<T: DefinedClass>(obj: Allocated<T>) -> Retained<T>
     where
         T::Super: ClassType,
         T::Ivars: Default,
@@ -456,7 +456,7 @@ mod tests {
     }
 
     /// Initialize properly.
-    unsafe fn init<T: DeclaredClass>(obj: Allocated<T>) -> Retained<T> {
+    unsafe fn init<T: DefinedClass>(obj: Allocated<T>) -> Retained<T> {
         unsafe { msg_send_id![obj, init] }
     }
 
@@ -496,7 +496,7 @@ mod tests {
 
         // First class
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "ImplsDrop"]
             #[ivars = ()]
@@ -530,7 +530,7 @@ mod tests {
 
         // Subclass
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(ImplsDrop))]
             #[name = "IvarsImplDrop"]
             #[ivars = IvarThatImplsDrop]
@@ -558,7 +558,7 @@ mod tests {
 
         // Further subclass
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(IvarsImplDrop))]
             #[name = "BothIvarsAndTypeImplsDrop"]
             #[ivars = IvarThatImplsDrop]
@@ -608,7 +608,7 @@ mod tests {
             field2: bool,
         }
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "IvarsNoDrop"]
             #[ivars = Ivar]
@@ -628,7 +628,7 @@ mod tests {
         #[derive(Default, Debug, Clone, Copy)]
         struct Ivar;
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "IvarZst"]
             #[ivars = Cell<Ivar>]
@@ -666,7 +666,7 @@ mod tests {
         #[repr(align(16))]
         struct HighAlignment;
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "HasIvarWithHighAlignment"]
             #[ivars = HighAlignment]
@@ -691,7 +691,7 @@ mod tests {
 
     #[test]
     fn test_ivar_access() {
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "RcIvar"]
             #[ivars = Cell<Option<Retained<RcTestObject>>>]
@@ -751,7 +751,7 @@ mod tests {
             obj: Cell<Retained<RcTestObject>>,
         }
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(RcIvar))]
             #[name = "RcIvarSubclass"]
             #[ivars = RcIvarSubclassIvars]
@@ -816,7 +816,7 @@ mod tests {
     #[cfg_attr(not(debug_assertions), ignore = "only panics with debug assertions")]
     #[should_panic = "tried to access uninitialized instance variable"]
     fn access_invalid() {
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "InvalidAccess"]
             // Type has to have a drop flag to detect invalid access
@@ -833,7 +833,7 @@ mod tests {
     #[should_panic = "panic in drop"]
     #[ignore = "panicking in Drop requires that we actually implement `dealloc` as `C-unwind`"]
     fn test_panic_in_drop() {
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "DropPanics"]
             struct DropPanics;
@@ -862,7 +862,7 @@ mod tests {
             }
         }
 
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "IvarDropPanics"]
             #[ivars = DropPanics]
@@ -882,7 +882,7 @@ mod tests {
     // performance.
     #[test]
     fn test_retain_leak_in_drop() {
-        declare_class!(
+        define_class!(
             // SAFETY: Intentionally broken!
             #[unsafe(super(NSObject))]
             #[name = "DropRetainsAndLeaksSelf"]
diff --git a/crates/objc2/src/__macro_helpers/mod.rs b/crates/objc2/src/__macro_helpers/mod.rs
index 4e70c879d..4e048b24d 100644
--- a/crates/objc2/src/__macro_helpers/mod.rs
+++ b/crates/objc2/src/__macro_helpers/mod.rs
@@ -18,8 +18,8 @@ mod cache;
 mod class;
 mod common_selectors;
 mod convert;
-mod declare_class;
-pub(crate) mod declared_ivars;
+mod define_class;
+pub(crate) mod defined_ivars;
 mod image_info;
 mod method_family;
 mod module_info;
@@ -33,11 +33,11 @@ pub use self::cache::{CachedClass, CachedSel};
 pub use self::class::{DoesNotImplDrop, MainThreadOnlyDoesNotImplSendSync, ValidThreadKind};
 pub use self::common_selectors::{alloc_sel, dealloc_sel, init_sel, new_sel};
 pub use self::convert::{ConvertArgument, ConvertArguments, ConvertReturn, TupleExtender};
-pub use self::declare_class::{
+pub use self::define_class::{
     ClassBuilderHelper, ClassProtocolMethodsBuilder, MaybeOptionRetained, MessageReceiveRetained,
     RetainedReturnValue, ThreadKindAutoTraits,
 };
-pub use self::declared_ivars::DeclaredIvarsHelper;
+pub use self::defined_ivars::DefinedIvarsHelper;
 pub use self::image_info::ImageInfo;
 pub use self::method_family::{
     retain_semantics, Alloc, Copy, Init, MutableCopy, New, Other, RetainSemantics,
diff --git a/crates/objc2/src/__macro_helpers/msg_send.rs b/crates/objc2/src/__macro_helpers/msg_send.rs
index 188745ba1..1cad77fcd 100644
--- a/crates/objc2/src/__macro_helpers/msg_send.rs
+++ b/crates/objc2/src/__macro_helpers/msg_send.rs
@@ -184,7 +184,7 @@ impl<T: ?Sized + Message> MsgSend for ManuallyDrop<Retained<T>> {
 mod tests {
     use crate::rc::{autoreleasepool, RcTestObject, ThreadTestData};
     use crate::runtime::NSObject;
-    use crate::{declare_class, msg_send, msg_send_id, test_utils};
+    use crate::{define_class, msg_send, msg_send_id, test_utils};
 
     use super::*;
 
@@ -229,7 +229,7 @@ mod tests {
         }
     }
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(RcTestObject, NSObject))]
         #[name = "RcTestObjectSubclass"]
         #[derive(Debug, PartialEq, Eq)]
diff --git a/crates/objc2/src/__macro_helpers/msg_send_retained.rs b/crates/objc2/src/__macro_helpers/msg_send_retained.rs
index c5913f569..8f801128a 100644
--- a/crates/objc2/src/__macro_helpers/msg_send_retained.rs
+++ b/crates/objc2/src/__macro_helpers/msg_send_retained.rs
@@ -3,9 +3,9 @@ use core::ptr::{self, NonNull};
 use crate::encode::{Encode, RefEncode};
 use crate::rc::{Allocated, PartialInit, Retained};
 use crate::runtime::{AnyClass, AnyObject, Sel};
-use crate::{sel, ClassType, DeclaredClass, Message};
+use crate::{sel, ClassType, DefinedClass, Message};
 
-use super::declared_ivars::set_finalized;
+use super::defined_ivars::set_finalized;
 use super::{Alloc, ConvertArguments, Copy, Init, MsgSend, MutableCopy, New, Other, TupleExtender};
 
 pub trait MsgSendRetained<T, U> {
@@ -300,7 +300,7 @@ impl<T: ?Sized + Message> MsgSendRetained<Allocated<T>, Option<Retained<T>>> for
     }
 }
 
-impl<T: DeclaredClass> MsgSendSuperRetained<PartialInit<T>, Option<Retained<T>>> for Init {
+impl<T: DefinedClass> MsgSendSuperRetained<PartialInit<T>, Option<Retained<T>>> for Init {
     type Inner = T;
 
     #[inline]
@@ -1008,7 +1008,7 @@ mod tests {
         1
     } else if cfg!(target_arch = "x86") {
         // x86 autorelease_return is not currently tail-called, so the
-        // optimization doesn't work on declare_class! functions.
+        // optimization doesn't work on define_class! functions.
         2
     } else if cfg!(target_arch = "aarch64") {
         // Currently doesn't work
diff --git a/crates/objc2/src/__macro_helpers/writeback.rs b/crates/objc2/src/__macro_helpers/writeback.rs
index f16ceaa06..ef6ff334d 100644
--- a/crates/objc2/src/__macro_helpers/writeback.rs
+++ b/crates/objc2/src/__macro_helpers/writeback.rs
@@ -34,8 +34,8 @@ impl<T: Message + 'static> ConvertArgument for &mut Retained<T> {
     );
 
     #[inline]
-    fn __from_declared_param(_inner: Self::__Inner) -> Self {
-        todo!("`&mut Retained<_>` is not supported in `declare_class!` yet")
+    fn __from_defined_param(_inner: Self::__Inner) -> Self {
+        todo!("`&mut Retained<_>` is not supported in `define_class!` yet")
     }
 
     #[inline]
@@ -115,8 +115,8 @@ impl<T: Message + 'static> ConvertArgument for &mut Option<Retained<T>> {
     type __StoredBeforeMessage = (Self::__Inner, *mut T);
 
     #[inline]
-    fn __from_declared_param(_inner: Self::__Inner) -> Self {
-        todo!("`&mut Option<Retained<_>>` is not supported in `declare_class!` yet")
+    fn __from_defined_param(_inner: Self::__Inner) -> Self {
+        todo!("`&mut Option<Retained<_>>` is not supported in `define_class!` yet")
     }
 
     #[inline]
@@ -162,8 +162,8 @@ impl<T: Message + 'static> ConvertArgument for Option<&mut Retained<T>> {
     type __StoredBeforeMessage = Option<(NonNull<*mut T>, NonNull<T>)>;
 
     #[inline]
-    fn __from_declared_param(_inner: Self::__Inner) -> Self {
-        todo!("`Option<&mut Retained<_>>` is not supported in `declare_class!` yet")
+    fn __from_defined_param(_inner: Self::__Inner) -> Self {
+        todo!("`Option<&mut Retained<_>>` is not supported in `define_class!` yet")
     }
 
     #[inline]
@@ -191,8 +191,8 @@ impl<T: Message + 'static> ConvertArgument for Option<&mut Option<Retained<T>>>
     type __StoredBeforeMessage = Option<(NonNull<*mut T>, *mut T)>;
 
     #[inline]
-    fn __from_declared_param(_inner: Self::__Inner) -> Self {
-        todo!("`Option<&mut Option<Retained<_>>>` is not supported in `declare_class!` yet")
+    fn __from_defined_param(_inner: Self::__Inner) -> Self {
+        todo!("`Option<&mut Option<Retained<_>>>` is not supported in `define_class!` yet")
     }
 
     #[inline]
diff --git a/crates/objc2/src/downcast.rs b/crates/objc2/src/downcast.rs
index 6efbff7d5..537e4c208 100644
--- a/crates/objc2/src/downcast.rs
+++ b/crates/objc2/src/downcast.rs
@@ -12,10 +12,10 @@ use crate::ClassType;
 /// is unknown.
 ///
 /// This trait is implemented automatically by the [`extern_class!`] and
-/// [`declare_class!`] macros.
+/// [`define_class!`] macros.
 ///
 /// [`extern_class!`]: crate::extern_class
-/// [`declare_class!`]: crate::declare_class
+/// [`define_class!`]: crate::define_class
 ///
 ///
 /// # Safety
diff --git a/crates/objc2/src/encode.rs b/crates/objc2/src/encode.rs
index 81a2a49e0..f7861f70f 100644
--- a/crates/objc2/src/encode.rs
+++ b/crates/objc2/src/encode.rs
@@ -350,7 +350,7 @@ mod argument_private {
 //
 // You might be tempted to think that `bool` could work in this, but that
 // would be a mistake (even ignoring that its size is different on certain
-// targets) because it cannot be safely used in declared methods.
+// targets) because it cannot be safely used in custom defined methods.
 pub unsafe trait EncodeArgument: argument_private::Sealed {
     /// The Objective-C type-encoding for this type.
     const ENCODING_ARGUMENT: Encoding;
diff --git a/crates/objc2/src/lib.rs b/crates/objc2/src/lib.rs
index 4ff7ab12e..35cecd686 100644
--- a/crates/objc2/src/lib.rs
+++ b/crates/objc2/src/lib.rs
@@ -138,13 +138,11 @@
 //!
 //! ## Other functionality
 //!
-//! That was a quick introduction, this library also has [support for handling
-//! exceptions][exc], [the ability to declare Objective-C
-//! classes][declare_class!], [advanced reference-counting utilities][rc], and more -
-//! peruse the documentation at will!
-//!
-//! [exc]: crate::exception
-//! [rc]: crate::rc
+//! That was a quick introduction, this library also has
+//! [support for handling exceptions][crate::exception],
+//! [the ability to create Objective-C classes][crate::define_class],
+//! [advanced reference-counting utilities][crate::rc],
+//! and more - peruse the documentation at will!
 
 #![no_std]
 #![cfg_attr(
@@ -179,7 +177,7 @@ pub use self::downcast::DowncastTarget;
 pub use self::encode::{Encode, Encoding, RefEncode};
 pub use self::main_thread_marker::MainThreadMarker;
 pub use self::top_level_traits::{
-    AllocAnyThread, ClassType, DeclaredClass, MainThreadOnly, Message, ProtocolType, ThreadKind,
+    AllocAnyThread, ClassType, DefinedClass, MainThreadOnly, Message, ProtocolType, ThreadKind,
 };
 
 #[cfg(feature = "objc2-proc-macros")]
@@ -221,8 +219,8 @@ mod verify;
 /// module.
 #[deprecated = "Moved to the `runtime` module"]
 pub mod declare {
+    use super::runtime;
     pub use super::runtime::{ClassBuilder, ProtocolBuilder};
-    use super::*;
 
     /// Use [`runtime::ClassBuilder`] instead.
     #[deprecated = "Use `runtime::ClassBuilder` instead."]
@@ -233,6 +231,10 @@ pub mod declare {
     pub type ProtocolDecl = runtime::ProtocolBuilder;
 }
 
+/// Deprecated alias of [`DefinedClass`].
+#[deprecated = "renamed to DefinedClass"]
+pub use DefinedClass as DeclaredClass;
+
 #[cfg(not(feature = "std"))]
 compile_error!("The `std` feature currently must be enabled.");
 
diff --git a/crates/objc2/src/macros/__attribute_helpers.rs b/crates/objc2/src/macros/__attribute_helpers.rs
index 40e9c2342..46e2bd054 100644
--- a/crates/objc2/src/macros/__attribute_helpers.rs
+++ b/crates/objc2/src/macros/__attribute_helpers.rs
@@ -335,7 +335,7 @@ macro_rules! __extract_custom_attributes_inner {
 
 /// Extract struct attributes, and send them to another macro.
 ///
-/// Used by `declare_class!` and `extern_class!`.
+/// Used by `define_class!` and `extern_class!`.
 ///
 /// This will ensure that there is only one of our custom attributes present.
 ///
diff --git a/crates/objc2/src/macros/declare_class.rs b/crates/objc2/src/macros/define_class.rs
similarity index 89%
rename from crates/objc2/src/macros/declare_class.rs
rename to crates/objc2/src/macros/define_class.rs
index db2c67c0a..992d99117 100644
--- a/crates/objc2/src/macros/declare_class.rs
+++ b/crates/objc2/src/macros/define_class.rs
@@ -1,4 +1,4 @@
-/// Declare a new class.
+/// Create a new class.
 ///
 /// This is useful in many cases since Objective-C frameworks tend to favour a
 /// design pattern using "delegates", where to hook into a piece of
@@ -6,23 +6,27 @@
 /// a custom class.
 ///
 /// This macro is the declarative way of creating classes, in contrast with
-/// the [`declare`] module which mostly contain ways of declaring classes in
-/// an imperative fashion. It is highly recommended that you use this macro
-/// though, since it contains a lot of extra debug assertions and niceties
-/// that help ensure the soundness of your code.
+/// [`ClassBuilder`], which allows creating classes in an imperative fashion.
+/// It is highly recommended that you use this macro though, since it contains
+/// a lot of extra debug assertions and niceties that help ensure the
+/// soundness of your code.
 ///
 /// The class is guaranteed to have been created and registered with the
 /// Objective-C runtime after the [`ClassType::class`] function has been
 /// called.
 ///
-/// [`declare`]: crate::declare
+/// See [Apple's documentation] on defining classes for a more in-depth
+/// introduction.
+///
+/// [Apple's documentation]: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/DefiningClasses/DefiningClasses.html
+/// [`ClassBuilder`]: crate::runtime::ClassBuilder
 /// [`ClassType::class`]: crate::ClassType::class
 ///
 ///
 /// # Specification
 ///
 /// This macro consists of the following parts:
-/// - The type declaration with special attributes.
+/// - The type definition, along with special attributes.
 /// - Any number of inherent implementations.
 /// - Any number of protocol implementations.
 ///
@@ -31,7 +35,7 @@
 ///
 /// This macro creates an opaque struct with implementations in [a similar
 /// manner as the `extern_class!` macro][ec_spec]. Additionally, it implements
-/// the [`DeclaredClass`] trait, as well as any protocols specified in the
+/// the [`DefinedClass`] trait, as well as any protocols specified in the
 /// protocol implementations.
 ///
 /// If the type implements [`Drop`], the macro will generate a `dealloc`
@@ -42,7 +46,7 @@
 /// [`extern_class!`]: crate::extern_class
 /// [`extern_methods!`]: crate::extern_methods
 /// [ec_spec]: crate::extern_class#specification
-/// [`DeclaredClass`]: crate::DeclaredClass
+/// [`DefinedClass`]: crate::DefinedClass
 ///
 ///
 /// ## Attributes
@@ -86,7 +90,7 @@
 /// `init`), you must override the subclass' designated initializers, and
 /// initialize your ivars properly in there.
 ///
-/// [the instance variables]: crate::DeclaredClass::Ivars
+/// [the instance variables]: crate::DefinedClass::Ivars
 /// [`Cell`]: core::cell::Cell
 /// [`RefCell`]: core::cell::RefCell
 /// [interior_mutability]: crate::topics::interior_mutability
@@ -252,7 +256,7 @@
 ///
 /// # Examples
 ///
-/// Declare a class `MyCustomObject` that inherits `NSObject`, has a few
+/// Define a class `MyCustomObject` that inherits `NSObject`, has a few
 /// instance variables and methods, and implements the `NSCopying` protocol.
 ///
 /// ```
@@ -263,8 +267,8 @@
 /// use objc2_foundation::{NSCopying, NSObject, NSObjectProtocol, NSZone};
 /// use objc2::rc::{Allocated, Retained};
 /// use objc2::{
-///     declare_class, extern_protocol, msg_send, msg_send_id, AllocAnyThread,
-///     ClassType, DeclaredClass, ProtocolType,
+///     define_class, extern_protocol, msg_send, msg_send_id, AllocAnyThread,
+///     ClassType, DefinedClass, ProtocolType,
 /// };
 ///
 /// #[derive(Clone)]
@@ -274,7 +278,7 @@
 ///     object: Retained<NSObject>,
 /// }
 ///
-/// declare_class!(
+/// define_class!(
 ///     // SAFETY:
 ///     // - The superclass NSObject does not have any subclassing requirements.
 ///     // - `MyCustomObject` does not implement `Drop`.
@@ -430,7 +434,7 @@
 #[doc(alias = "@interface")]
 #[doc(alias = "@implementation")]
 #[macro_export]
-macro_rules! declare_class {
+macro_rules! define_class {
     {
         // The following special attributes are supported:
         // - #[unsafe(super($($superclasses:path),*))]
@@ -449,14 +453,14 @@ macro_rules! declare_class {
         $crate::__extract_struct_attributes! {
             ($(#[$($attrs)*])*)
 
-            ($crate::__declare_class_inner)
+            ($crate::__define_class_inner)
             ($v)
             ($class)
             ($($impls)*)
         }
 
         // Methods.
-        $crate::__declare_class_output_impls! {
+        $crate::__define_class_output_impls! {
             $($impls)*
         }
     };
@@ -464,7 +468,37 @@ macro_rules! declare_class {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_inner {
+macro_rules! declare_class {
+    {
+        $(#[$m:meta])*
+        $v:vis struct $name:ident;
+
+        unsafe impl ClassType for $for_class:ty {
+            $(#[inherits($($inheritance_rest:ty),+)])?
+            type Super = $superclass:ty;
+
+            type Mutability = $mutability:ty;
+
+            const NAME: &'static str = $name_const:expr;
+        }
+
+        impl DefinedClass for $for_defined:ty {
+            $(type Ivars = $ivars:ty;)?
+        }
+
+        $($impls:tt)*
+    } => {
+        // For slightly better diagnostics
+        $(#[$m])*
+        $v struct $name;
+
+        $crate::__macro_helpers::compile_error!("declare_class! has been renamed to define_class!, and the syntax has changed")
+    }
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __define_class_inner {
     (
         ($v:vis)
         ($class:ident)
@@ -494,7 +528,7 @@ macro_rules! __declare_class_inner {
             }>,
             __phantom: $crate::__macro_helpers::PhantomData<(
                 // Include ivars for auto traits.
-                <Self as $crate::DeclaredClass>::Ivars,
+                <Self as $crate::DefinedClass>::Ivars,
                 // Translate thread kind to appropriate auto traits.
                 $crate::__macro_helpers::ThreadKindAutoTraits<<Self as $crate::ClassType>::ThreadKind>,
             )>,
@@ -507,7 +541,7 @@ macro_rules! __declare_class_inner {
             ($($superclass, $($superclasses,)*)? $crate::runtime::AnyObject)
         }
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($class)
             ($($derives)*)
@@ -556,7 +590,7 @@ macro_rules! __declare_class_inner {
                         let mut __objc2_builder = $crate::__macro_helpers::ClassBuilderHelper::<Self>::new();
 
                         // Implement protocols and methods
-                        $crate::__declare_class_register_impls! {
+                        $crate::__define_class_register_impls! {
                             (__objc2_builder)
                             $($impls)*
                         }
@@ -567,10 +601,10 @@ macro_rules! __declare_class_inner {
                         // before any access to the variables.
                         unsafe {
                             __OBJC2_CLASS.get().write($crate::__macro_helpers::MaybeUninit::new(__objc2_cls));
-                            if <Self as $crate::__macro_helpers::DeclaredIvarsHelper>::HAS_IVARS {
+                            if <Self as $crate::__macro_helpers::DefinedIvarsHelper>::HAS_IVARS {
                                 __OBJC2_IVAR_OFFSET.get().write($crate::__macro_helpers::MaybeUninit::new(__objc2_ivar_offset));
                             }
-                            if <Self as $crate::__macro_helpers::DeclaredIvarsHelper>::HAS_DROP_FLAG {
+                            if <Self as $crate::__macro_helpers::DefinedIvarsHelper>::HAS_DROP_FLAG {
                                 __OBJC2_DROP_FLAG_OFFSET.get().write($crate::__macro_helpers::MaybeUninit::new(__objc2_drop_flag_offset));
                             }
                         }
@@ -590,7 +624,7 @@ macro_rules! __declare_class_inner {
                 type __SubclassingType = Self;
             }
 
-            impl $crate::DeclaredClass for $class {
+            impl $crate::DefinedClass for $class {
                 type Ivars = $crate::__select_ivars!($($ivars)?);
 
                 #[inline]
@@ -599,7 +633,7 @@ macro_rules! __declare_class_inner {
                     //
                     // This makes the offset not be included in the final
                     // executable if it's not needed.
-                    if <Self as $crate::__macro_helpers::DeclaredIvarsHelper>::HAS_IVARS {
+                    if <Self as $crate::__macro_helpers::DefinedIvarsHelper>::HAS_IVARS {
                         // SAFETY: Accessing the offset is guaranteed to only be
                         // done after the class has been initialized.
                         unsafe { __OBJC2_IVAR_OFFSET.get().read().assume_init() }
@@ -614,7 +648,7 @@ macro_rules! __declare_class_inner {
 
                 #[inline]
                 fn __drop_flag_offset() -> $crate::__macro_helpers::isize {
-                    if <Self as $crate::__macro_helpers::DeclaredIvarsHelper>::HAS_DROP_FLAG {
+                    if <Self as $crate::__macro_helpers::DefinedIvarsHelper>::HAS_DROP_FLAG {
                         // SAFETY: Same as above.
                         unsafe { __OBJC2_DROP_FLAG_OFFSET.get().read().assume_init() }
                     } else {
@@ -644,7 +678,7 @@ macro_rules! __declare_class_inner {
 /// Mirror of [`crate::__extern_class_derives`].
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_derives {
+macro_rules! __define_class_derives {
     // Base case
     (
         ($($attr_impl:tt)*)
@@ -668,12 +702,12 @@ macro_rules! __declare_class_derives {
             fn fmt(&self, f: &mut $crate::__macro_helpers::fmt::Formatter<'_>) -> $crate::__macro_helpers::fmt::Result {
                 f.debug_struct($crate::__macro_helpers::stringify!($for))
                     .field("super", &**self.__superclass)
-                    .field("ivars", <Self as $crate::DeclaredClass>::ivars(self))
+                    .field("ivars", <Self as $crate::DefinedClass>::ivars(self))
                     .finish()
             }
         }
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($for)
             ($($rest)*)
@@ -700,7 +734,7 @@ macro_rules! __declare_class_derives {
             }
         }
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($for)
             ($($rest)*)
@@ -721,7 +755,7 @@ macro_rules! __declare_class_derives {
         #[automatically_derived]
         impl $crate::__macro_helpers::Eq for $for {}
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($for)
             ($($rest)*)
@@ -748,7 +782,7 @@ macro_rules! __declare_class_derives {
             }
         }
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($for)
             ($($rest)*)
@@ -771,10 +805,10 @@ macro_rules! __declare_class_derives {
             struct Derive;
         };
         $crate::__macro_helpers::compile_error!($crate::__macro_helpers::stringify!(
-            #[derive($derive)] is not supported in declare_class!
+            #[derive($derive)] is not supported in define_class!
         ));
 
-        $crate::__declare_class_derives! {
+        $crate::__define_class_derives! {
             ($($attr_impl)*)
             ($for)
             ($($($rest)*)?)
@@ -796,7 +830,7 @@ macro_rules! __select_ivars {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_output_impls {
+macro_rules! __define_class_output_impls {
     // Base-case
     () => {};
 
@@ -815,12 +849,12 @@ macro_rules! __declare_class_output_impls {
 
         $(#[$m])*
         impl $for {
-            $crate::__declare_class_output_methods! {
+            $crate::__define_class_output_methods! {
                 $($methods)*
             }
         }
 
-        $crate::__declare_class_output_impls!{
+        $crate::__define_class_output_impls!{
             $($rest)*
         }
     };
@@ -836,12 +870,12 @@ macro_rules! __declare_class_output_impls {
     ) => {
         $(#[$m])*
         impl $for {
-            $crate::__declare_class_output_methods! {
+            $crate::__define_class_output_methods! {
                 $($methods)*
             }
         }
 
-        $crate::__declare_class_output_impls! {
+        $crate::__define_class_output_impls! {
             $($rest)*
         }
     };
@@ -849,7 +883,7 @@ macro_rules! __declare_class_output_impls {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_output_methods {
+macro_rules! __define_class_output_methods {
     // Base case
     {} => {};
 
@@ -866,14 +900,14 @@ macro_rules! __declare_class_output_methods {
             ($crate::__extract_custom_attributes)
             ($(#[$($m)*])*)
 
-            ($crate::__declare_class_method_out)
+            ($crate::__define_class_method_out)
             (unsafe)
             ($name)
             ($($ret)?)
             ($body)
         }
 
-        $crate::__declare_class_output_methods! {
+        $crate::__define_class_output_methods! {
             $($rest)*
         }
     };
@@ -891,14 +925,14 @@ macro_rules! __declare_class_output_methods {
             ($crate::__extract_custom_attributes)
             ($(#[$($m)*])*)
 
-            ($crate::__declare_class_method_out)
+            ($crate::__define_class_method_out)
             ()
             ($name)
             ($($ret)?)
             ($body)
         }
 
-        $crate::__declare_class_output_methods! {
+        $crate::__define_class_output_methods! {
             $($rest)*
         }
     };
@@ -906,7 +940,7 @@ macro_rules! __declare_class_output_methods {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_register_impls {
+macro_rules! __define_class_register_impls {
     // Base-case
     (
         ($builder:ident)
@@ -936,18 +970,18 @@ macro_rules! __declare_class_register_impls {
             #[allow(unused_unsafe)]
             // SAFETY: Upheld by caller
             unsafe {
-                $crate::__declare_class_register_methods! {
+                $crate::__define_class_register_methods! {
                     (__objc2_protocol_builder)
 
                     $($methods)*
                 }
             }
 
-            // Finished declaring protocol; get error message if any
+            // Finished creating protocol; get error message if any
             __objc2_protocol_builder.finish();
         }
 
-        $crate::__declare_class_register_impls! {
+        $crate::__define_class_register_impls! {
             ($builder)
             $($rest)*
         }
@@ -973,7 +1007,7 @@ macro_rules! __declare_class_register_impls {
             #[allow(unused_unsafe)]
             // SAFETY: Upheld by caller
             unsafe {
-                $crate::__declare_class_register_methods! {
+                $crate::__define_class_register_methods! {
                     ($builder)
 
                     $($methods)*
@@ -981,7 +1015,7 @@ macro_rules! __declare_class_register_impls {
             }
         }
 
-        $crate::__declare_class_register_impls! {
+        $crate::__define_class_register_impls! {
             ($builder)
             $($rest)*
         }
@@ -990,7 +1024,7 @@ macro_rules! __declare_class_register_impls {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_register_methods {
+macro_rules! __define_class_register_methods {
     // Base case
     {
         ($builder:ident)
@@ -1011,7 +1045,7 @@ macro_rules! __declare_class_register_methods {
             ($crate::__extract_custom_attributes)
             ($(#[$($m)*])*)
 
-            ($crate::__declare_class_register_out)
+            ($crate::__define_class_register_out)
             ($builder)
             (unsafe)
             ($name)
@@ -1019,7 +1053,7 @@ macro_rules! __declare_class_register_methods {
             ($body)
         }
 
-        $crate::__declare_class_register_methods! {
+        $crate::__define_class_register_methods! {
             ($builder)
 
             $($rest)*
@@ -1041,7 +1075,7 @@ macro_rules! __declare_class_register_methods {
             ($crate::__extract_custom_attributes)
             ($(#[$($m)*])*)
 
-            ($crate::__declare_class_register_out)
+            ($crate::__define_class_register_out)
             ($builder)
             ()
             ($name)
@@ -1049,7 +1083,7 @@ macro_rules! __declare_class_register_methods {
             ($body)
         }
 
-        $crate::__declare_class_register_methods! {
+        $crate::__define_class_register_methods! {
             ($builder)
 
             $($rest)*
@@ -1058,7 +1092,7 @@ macro_rules! __declare_class_register_methods {
 
     // Consume associated items for better UI.
     //
-    // This will still fail inside __declare_class_output_methods!
+    // This will still fail inside __define_class_output_methods!
     {
         ($builder:ident)
 
@@ -1066,7 +1100,7 @@ macro_rules! __declare_class_register_methods {
 
         $($rest:tt)*
     } => {
-        $crate::__declare_class_output_methods! {
+        $crate::__define_class_output_methods! {
             ($builder)
 
             $($rest)*
@@ -1076,7 +1110,7 @@ macro_rules! __declare_class_register_methods {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_method_out {
+macro_rules! __define_class_method_out {
     {
         ($($qualifiers:tt)*)
         ($name:ident)
@@ -1094,12 +1128,12 @@ macro_rules! __declare_class_method_out {
         ($($m_optional:tt)*)
         ($($m_checked:tt)*)
     } => {
-        $crate::__declare_class_rewrite_params! {
+        $crate::__define_class_rewrite_params! {
             ($($params_rest)*)
             ()
             ()
 
-            ($crate::__declare_class_method_out_inner)
+            ($crate::__define_class_method_out_inner)
 
             ($($qualifiers)*)
             ($name)
@@ -1121,7 +1155,7 @@ macro_rules! __declare_class_method_out {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_rewrite_params {
+macro_rules! __define_class_rewrite_params {
     // Convert _
     {
         (_ : $param_ty:ty $(, $($params_rest:tt)*)?)
@@ -1131,7 +1165,7 @@ macro_rules! __declare_class_rewrite_params {
         ($out_macro:path)
         $($macro_args:tt)*
     } => {
-        $crate::__declare_class_rewrite_params! {
+        $crate::__define_class_rewrite_params! {
             ($($($params_rest)*)?)
             ($($params_converted)* _ : <$param_ty as $crate::__macro_helpers::ConvertArgument>::__Inner,)
             ($($body_prefix)*)
@@ -1149,12 +1183,12 @@ macro_rules! __declare_class_rewrite_params {
         ($out_macro:path)
         $($macro_args:tt)*
     } => {
-        $crate::__declare_class_rewrite_params! {
+        $crate::__define_class_rewrite_params! {
             ($($($params_rest)*)?)
             ($($params_converted)* $param : <$param_ty as $crate::__macro_helpers::ConvertArgument>::__Inner,)
             (
                 $($body_prefix)*
-                let mut $param = <$param_ty as $crate::__macro_helpers::ConvertArgument>::__from_declared_param($param);
+                let mut $param = <$param_ty as $crate::__macro_helpers::ConvertArgument>::__from_defined_param($param);
             )
 
             ($out_macro)
@@ -1170,12 +1204,12 @@ macro_rules! __declare_class_rewrite_params {
         ($out_macro:path)
         $($macro_args:tt)*
     } => {
-        $crate::__declare_class_rewrite_params! {
+        $crate::__define_class_rewrite_params! {
             ($($($params_rest)*)?)
             ($($params_converted)* $param : <$param_ty as $crate::__macro_helpers::ConvertArgument>::__Inner,)
             (
                 $($body_prefix)*
-                let $param = <$param_ty as $crate::__macro_helpers::ConvertArgument>::__from_declared_param($param);
+                let $param = <$param_ty as $crate::__macro_helpers::ConvertArgument>::__from_defined_param($param);
             )
 
             ($out_macro)
@@ -1202,7 +1236,7 @@ macro_rules! __declare_class_rewrite_params {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_method_out_inner {
+macro_rules! __define_class_method_out_inner {
     // #[method(...)]
     {
         ($($qualifiers:tt)*)
@@ -1249,7 +1283,7 @@ macro_rules! __declare_class_method_out_inner {
         ($($params_prefix:tt)*)
 
         (#[method_id($($sel:tt)*)])
-        () // Specifying retain semantics is unsupported in declare_class! for now
+        () // Specifying retain semantics is unsupported in define_class! for now
         ($($__m_optional:tt)*)
         ($($m_checked:tt)*)
 
@@ -1318,13 +1352,13 @@ macro_rules! __convert_result {
     ($body:block; $ret:ty) => {
         let __objc2_result = $body;
         #[allow(unreachable_code)]
-        <$ret as $crate::__macro_helpers::ConvertReturn>::__into_declared_return(__objc2_result)
+        <$ret as $crate::__macro_helpers::ConvertReturn>::__into_defined_return(__objc2_result)
     };
 }
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_register_out {
+macro_rules! __define_class_register_out {
     {
         ($builder:ident)
         ($($qualifiers:tt)*)
@@ -1346,7 +1380,7 @@ macro_rules! __declare_class_register_out {
         $crate::__extract_and_apply_cfg_attributes! {
             ($($m_checked)*)
 
-            $crate::__declare_class_invalid_selectors!(#[$method_or_method_id($($sel)*)]);
+            $crate::__define_class_invalid_selectors!(#[$method_or_method_id($($sel)*)]);
             $crate::__extern_methods_no_optional!($($m_optional)*);
 
             $builder.$builder_method(
@@ -1363,7 +1397,7 @@ macro_rules! __declare_class_register_out {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_invalid_selectors {
+macro_rules! __define_class_invalid_selectors {
     (#[method(dealloc)]) => {
         $crate::__macro_helpers::compile_error!(
             "`#[method(dealloc)]` is not supported. Implement `Drop` for the type instead"
@@ -1403,7 +1437,7 @@ macro_rules! __declare_class_invalid_selectors {
 
 #[doc(hidden)]
 #[macro_export]
-macro_rules! __declare_class_no_optional {
+macro_rules! __define_class_no_optional {
     () => {};
     (#[optional]) => {
         $crate::__macro_helpers::compile_error!(
diff --git a/crates/objc2/src/macros/extern_methods.rs b/crates/objc2/src/macros/extern_methods.rs
index f0bb14f4d..353b08703 100644
--- a/crates/objc2/src/macros/extern_methods.rs
+++ b/crates/objc2/src/macros/extern_methods.rs
@@ -69,12 +69,12 @@
 /// use objc2::ffi::NSUInteger;
 /// use objc2::rc::{Allocated, Retained};
 /// use objc2::runtime::NSObject;
-/// use objc2::{declare_class, extern_methods};
+/// use objc2::{define_class, extern_methods};
 ///
 /// // Shim
 /// type NSError = NSObject;
 ///
-/// declare_class!(
+/// define_class!(
 ///     // SAFETY:
 ///     // - The superclass NSObject does not have any subclassing requirements.
 ///     // - `MyObject` does not implement `Drop`.
@@ -122,12 +122,12 @@
 /// # use objc2::ffi::NSUInteger;
 /// # use objc2::rc::{Allocated, Retained};
 /// # use objc2::runtime::NSObject;
-/// # use objc2::{declare_class, extern_methods, ClassType};
+/// # use objc2::{define_class, extern_methods, ClassType};
 /// #
 /// # // Shim
 /// # type NSError = NSObject;
 /// #
-/// # declare_class!(
+/// # define_class!(
 /// #     #[unsafe(super(NSObject))]
 /// #     #[name = "MyObject2"]
 /// #     pub struct MyObject;
diff --git a/crates/objc2/src/macros/extern_protocol.rs b/crates/objc2/src/macros/extern_protocol.rs
index 3f27a53c6..a180204de 100644
--- a/crates/objc2/src/macros/extern_protocol.rs
+++ b/crates/objc2/src/macros/extern_protocol.rs
@@ -12,7 +12,7 @@
 /// to the functionality exposed by the protocol.
 ///
 /// Note that that conforming to a protocol in a custom object requires
-/// putting the implementation inside the [`declare_class!`] invocation.
+/// putting the implementation inside the [`define_class!`] invocation.
 ///
 /// Objective-C has a smart feature where you can write `id<MyProtocol>`, and
 /// then work with the protocol as-if it was an object; this is very similar
@@ -43,14 +43,14 @@
 ///
 /// Finally, you can use the `#[optional]` attribute to mark optional methods.
 /// This currently doesn't have any effect, but probably will have one in the
-/// future when implementing protocols in [`declare_class!`].
+/// future when implementing protocols in [`define_class!`].
 ///
 /// This macro otherwise shares similarities with [`extern_class!`] and
 /// [`extern_methods!`].
 ///
 /// [`ProtocolObject<dyn T>`]: crate::runtime::ProtocolObject
 /// [`ProtocolType`]: crate::ProtocolType
-/// [`declare_class!`]: crate::declare_class
+/// [`define_class!`]: crate::define_class
 /// [`extern_class!`]: crate::extern_class
 /// [`extern_methods!`]: crate::extern_methods
 ///
@@ -107,7 +107,7 @@
 ///             -> Retained<NSArray<NSString>>;
 ///
 ///         // The rest of these are optional, which means that a user of
-///         // `declare_class!` would not need to implement them.
+///         // `define_class!` would not need to implement them.
 ///
 ///         #[optional]
 ///         #[method_id(writableTypeIdentifiersForItemProvider)]
diff --git a/crates/objc2/src/macros/mod.rs b/crates/objc2/src/macros/mod.rs
index 1e9ae1b9b..5c464fbc3 100644
--- a/crates/objc2/src/macros/mod.rs
+++ b/crates/objc2/src/macros/mod.rs
@@ -4,7 +4,7 @@ mod __method_msg_send;
 mod __msg_send_parse;
 mod __rewrite_self_param;
 mod available;
-mod declare_class;
+mod define_class;
 mod extern_category;
 mod extern_class;
 mod extern_methods;
@@ -38,7 +38,7 @@ mod extern_protocol;
 /// Errors that were previously runtime panics may now turn into linker errors
 /// if you try to use a class which is not available. Additionally, you may
 /// have to call `msg_send![cls, class]` on the result if you want to use it
-/// in a dynamic context (e.g. dynamically declaring classes).
+/// in a dynamic context (e.g. when dynamically creating classes).
 ///
 /// See the [corresponding section][sel#features] in the [`sel!`] macro for
 /// more details on the limitations of this. The
@@ -907,7 +907,7 @@ macro_rules! __class_inner {
 /// ```no_run
 /// use objc2::msg_send;
 /// #
-/// # objc2::declare_class!(
+/// # objc2::define_class!(
 /// #     #[unsafe(super(objc2::runtime::NSObject))]
 /// #     #[name = "MyObject"]
 /// #     struct MyObject;
diff --git a/crates/objc2/src/rc/allocated_partial_init.rs b/crates/objc2/src/rc/allocated_partial_init.rs
index 4b819d25e..e65662e4f 100644
--- a/crates/objc2/src/rc/allocated_partial_init.rs
+++ b/crates/objc2/src/rc/allocated_partial_init.rs
@@ -3,9 +3,9 @@ use core::mem::ManuallyDrop;
 use core::ptr::NonNull;
 use core::{fmt, ptr};
 
-use crate::__macro_helpers::declared_ivars::initialize_ivars;
+use crate::__macro_helpers::defined_ivars::initialize_ivars;
 use crate::runtime::{objc_release_fast, AnyObject};
-use crate::{DeclaredClass, Message};
+use crate::{DefinedClass, Message};
 
 /// An Objective-C object that has been allocated, but not initialized.
 ///
@@ -161,7 +161,7 @@ impl<T: ?Sized + Message> Allocated<T> {
     #[track_caller]
     pub fn set_ivars(self, ivars: T::Ivars) -> PartialInit<T>
     where
-        T: DeclaredClass + Sized,
+        T: DefinedClass + Sized,
     {
         if let Some(ptr) = NonNull::new(ManuallyDrop::new(self).ptr as *mut T) {
             // SAFETY: The pointer came from `self`, so it is valid.
diff --git a/crates/objc2/src/rc/retained.rs b/crates/objc2/src/rc/retained.rs
index 38b0f2728..15f135f75 100644
--- a/crates/objc2/src/rc/retained.rs
+++ b/crates/objc2/src/rc/retained.rs
@@ -637,9 +637,9 @@ impl<T: Message> Retained<T> {
     /// The object is not immediately released, but will be when the innermost
     /// autorelease pool is drained.
     ///
-    /// This is useful when [declaring your own methods][declare] where you
-    /// will often find yourself in need of returning autoreleased objects to
-    /// properly follow [Cocoa's Memory Management Policy][mmRules].
+    /// This is useful when [defining your own methods][classbuilder] where
+    /// you will often find yourself in need of returning autoreleased objects
+    /// to properly follow [Cocoa's Memory Management Policy][mmRules].
     ///
     /// To that end, you could also use [`Retained::autorelease_ptr`], but
     /// this is more efficient than a normal `autorelease`, since it makes a
@@ -650,20 +650,19 @@ impl<T: Message> Retained<T> {
     /// This optimization relies heavily on this function being tail called,
     /// so make sure you only call this function at the end of your method.
     ///
-    /// [declare]: crate::declare
+    /// [classbuilder]: crate::runtime::ClassBuilder
     /// [mmRules]: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmRules.html
     ///
     ///
     /// # Example
     ///
-    /// Returning an `Retained` from a declared method (note: the [`declare_class!`]
-    /// macro supports doing this for you automatically).
+    /// Returning an `Retained` from a custom method (note: the
+    /// [`define_class!`] macro supports doing this for you automatically).
     ///
     /// ```
     /// use objc2::{class, msg_send_id, sel};
-    /// use objc2::declare::ClassBuilder;
     /// use objc2::rc::Retained;
-    /// use objc2::runtime::{AnyClass, AnyObject, Sel};
+    /// use objc2::runtime::{AnyClass, AnyObject, ClassBuilder, Sel};
     ///
     /// let mut builder = ClassBuilder::new(c"ExampleObject", class!(NSObject)).unwrap();
     ///
@@ -682,7 +681,7 @@ impl<T: Message> Retained<T> {
     /// let cls = builder.register();
     /// ```
     ///
-    /// [`declare_class!`]: crate::declare_class
+    /// [`define_class!`]: crate::define_class
     #[doc(alias = "objc_autoreleaseReturnValue")]
     #[must_use = "if you don't intend to use the object any more, drop it as usual"]
     #[inline]
@@ -736,7 +735,7 @@ impl<T: ?Sized> Drop for Retained<T> {
     ///
     /// The contained object's destructor (`Drop` impl, if it has one) is
     /// never run - override the `dealloc` method instead (which
-    /// `declare_class!` does for you).
+    /// `define_class!` does for you).
     #[doc(alias = "objc_release")]
     #[doc(alias = "release")]
     #[inline]
@@ -846,13 +845,13 @@ mod tests {
     use super::*;
     use crate::rc::{autoreleasepool, RcTestObject, ThreadTestData};
     use crate::runtime::{AnyObject, NSObject, NSObjectProtocol};
-    use crate::{declare_class, msg_send};
+    use crate::{define_class, msg_send};
 
     #[test]
     fn auto_traits() {
         macro_rules! helper {
             ($name:ident) => {
-                declare_class!(
+                define_class!(
                     #[unsafe(super(NSObject))]
                     #[name = concat!(stringify!($name), "Test")]
                     // Make the type not thread safe by default.
diff --git a/crates/objc2/src/rc/retained_traits.rs b/crates/objc2/src/rc/retained_traits.rs
index a9b32c780..a60f6ff1d 100644
--- a/crates/objc2/src/rc/retained_traits.rs
+++ b/crates/objc2/src/rc/retained_traits.rs
@@ -118,9 +118,9 @@ impl<T, U: RetainedFromIterator<T>> FromIterator<T> for Retained<U> {
 mod tests {
     use super::*;
     use crate::runtime::NSObject;
-    use crate::{declare_class, msg_send_id, ClassType};
+    use crate::{define_class, msg_send_id, ClassType};
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "MyCustomCollection"]
         #[derive(PartialEq, Eq, Hash, Debug)]
diff --git a/crates/objc2/src/rc/test_object.rs b/crates/objc2/src/rc/test_object.rs
index b3282d64b..988343b50 100644
--- a/crates/objc2/src/rc/test_object.rs
+++ b/crates/objc2/src/rc/test_object.rs
@@ -4,7 +4,7 @@ use core::ptr;
 
 use crate::rc::{Allocated, DefaultRetained, Retained};
 use crate::runtime::{NSObject, NSZone};
-use crate::{declare_class, msg_send, msg_send_id, ClassType};
+use crate::{define_class, msg_send, msg_send_id, ClassType};
 
 // TODO: Put tests that use this in another crate
 #[derive(Debug, Clone, Default, PartialEq, Eq)]
@@ -60,7 +60,7 @@ std::thread_local! {
     static TEST_DATA: RefCell<ThreadTestData> = RefCell::default();
 }
 
-declare_class!(
+define_class!(
     /// A helper object that counts how many times various reference-counting
     /// primitives are called.
     #[derive(Debug, PartialEq, Eq, Hash)]
diff --git a/crates/objc2/src/runtime/declare.rs b/crates/objc2/src/runtime/define.rs
similarity index 94%
rename from crates/objc2/src/runtime/declare.rs
rename to crates/objc2/src/runtime/define.rs
index 9c6743044..20f7c7284 100644
--- a/crates/objc2/src/runtime/declare.rs
+++ b/crates/objc2/src/runtime/define.rs
@@ -40,25 +40,24 @@ impl<T> Log2Alignment for T {
     };
 }
 
-/// A type for declaring a new class and adding new methods and ivars to it
+/// A type for creating a new class and adding new methods and ivars to it
 /// before registering it.
 ///
 /// **Note**: You likely don't need the dynamicism that this provides!
-/// Consider using the [`declare_class!`][crate::declare_class] macro instead.
+/// Consider using the [`define_class!`][crate::define_class] macro instead.
 ///
 ///
 /// # Example
 ///
-/// Declare a class named `MyNumber` that has one ivar, a `u32` named `_number`
+/// Create a class named `MyNumber` that has one ivar, a `u32` named `_number`
 /// and a few constructor  methods and methods for interfacing with the number
 /// (using interior mutability, as is common for Objective-C objects).
 ///
 /// ```
 /// use core::cell::Cell;
 ///
-/// use objc2::declare::ClassBuilder;
 /// use objc2::rc::Retained;
-/// use objc2::runtime::{AnyClass, AnyObject, NSObject, Sel};
+/// use objc2::runtime::{AnyClass, AnyObject, ClassBuilder, NSObject, Sel};
 /// use objc2::{sel, msg_send, msg_send_id, ClassType};
 ///
 /// fn register_class() -> &'static AnyClass {
@@ -210,8 +209,8 @@ impl ClassBuilder {
         Self::with_superclass(name, Some(superclass))
     }
 
-    /// Constructs a [`ClassBuilder`] declaring a new root class with the
-    /// given name.
+    /// Constructs a [`ClassBuilder`] that will construct a new root class
+    /// with the given name.
     ///
     /// Returns [`None`] if the class couldn't be allocated.
     ///
@@ -289,7 +288,7 @@ impl ClassBuilder {
                 if let Err(err) = crate::verify::verify_method_signature(method, enc_args, enc_ret)
                 {
                     panic!(
-                        "declared invalid method -[{} {sel}]: {err}",
+                        "defined invalid method -[{} {sel}]: {err}",
                         self.name().to_string_lossy()
                     )
                 }
@@ -354,7 +353,7 @@ impl ClassBuilder {
                 if let Err(err) = crate::verify::verify_method_signature(method, enc_args, enc_ret)
                 {
                     panic!(
-                        "declared invalid method +[{} {sel}]: {err}",
+                        "defined invalid method +[{} {sel}]: {err}",
                         self.name().to_string_lossy()
                     )
                 }
@@ -459,7 +458,7 @@ impl Drop for ClassBuilder {
     }
 }
 
-/// A type for declaring a new protocol and adding new methods to it
+/// A type for creating a new protocol and adding new methods to it
 /// before registering it.
 #[derive(Debug)]
 pub struct ProtocolBuilder {
@@ -516,7 +515,7 @@ impl ProtocolBuilder {
         }
     }
 
-    /// Adds an instance method declaration with a given description.
+    /// Add an instance method with a given description.
     pub fn add_method_description<Args, Ret>(&mut self, sel: Sel, required: bool)
     where
         Args: EncodeArguments,
@@ -531,7 +530,7 @@ impl ProtocolBuilder {
         );
     }
 
-    /// Adds a class method declaration with a given description.
+    /// Add a class method with a given description.
     pub fn add_class_method_description<Args, Ret>(&mut self, sel: Sel, required: bool)
     where
         Args: EncodeArguments,
@@ -583,7 +582,7 @@ mod tests {
     use crate::rc::Retained;
     use crate::runtime::{NSObject, NSObjectProtocol};
     use crate::{
-        declare_class, extern_methods, msg_send, msg_send_id, test_utils, ClassType, ProtocolType,
+        define_class, extern_methods, msg_send, msg_send_id, test_utils, ClassType, ProtocolType,
     };
 
     // TODO: Remove once c"" strings are in MSRV
@@ -685,7 +684,7 @@ mod tests {
     #[test]
     #[cfg_attr(
         debug_assertions,
-        should_panic = "declared invalid method -[TestClassBuilderInvalidMethod foo]: expected return to have type code 'I', but found 's'"
+        should_panic = "defined invalid method -[TestClassBuilderInvalidMethod foo]: expected return to have type code 'I', but found 's'"
     )]
     fn invalid_method() {
         let cls = test_utils::custom_class();
@@ -703,7 +702,7 @@ mod tests {
     #[test]
     #[cfg_attr(
         all(debug_assertions, not(feature = "relax-sign-encoding")),
-        should_panic = "declared invalid method +[TestClassBuilderInvalidClassMethod classFoo]: expected return to have type code 'I', but found 'i'"
+        should_panic = "defined invalid method +[TestClassBuilderInvalidClassMethod classFoo]: expected return to have type code 'I', but found 'i'"
     )]
     fn invalid_class_method() {
         let cls = test_utils::custom_class();
@@ -844,21 +843,21 @@ mod tests {
         assert_eq!(result, 7);
     }
 
-    // Proof-of-concept how we could make declare_class! accept generic types.
+    // Proof-of-concept how we could make define_class! accept generic types.
     #[test]
     fn test_generic() {
-        struct GenericDeclareClass<T>(T);
+        struct GenericDefineClass<T>(T);
 
-        unsafe impl<T> RefEncode for GenericDeclareClass<T> {
+        unsafe impl<T> RefEncode for GenericDefineClass<T> {
             const ENCODING_REF: Encoding = Encoding::Object;
         }
 
-        unsafe impl<T> Message for GenericDeclareClass<T> {}
+        unsafe impl<T> Message for GenericDefineClass<T> {}
 
-        unsafe impl<T> ClassType for GenericDeclareClass<T> {
+        unsafe impl<T> ClassType for GenericDefineClass<T> {
             type Super = NSObject;
             type ThreadKind = <Self::Super as ClassType>::ThreadKind;
-            const NAME: &'static str = "GenericDeclareClass";
+            const NAME: &'static str = "GenericDefineClass";
 
             #[inline]
             fn as_super(&self) -> &Self::Super {
@@ -872,7 +871,7 @@ mod tests {
                 unsafe {
                     builder.add_method(
                         sel!(generic),
-                        <GenericDeclareClass<T>>::generic as unsafe extern "C" fn(_, _),
+                        <GenericDefineClass<T>>::generic as unsafe extern "C" fn(_, _),
                     );
                 }
 
@@ -884,16 +883,16 @@ mod tests {
             type __SubclassingType = Self;
         }
 
-        impl<T> GenericDeclareClass<T> {
+        impl<T> GenericDefineClass<T> {
             extern "C" fn generic(&self, _cmd: Sel) {}
         }
 
-        let _ = GenericDeclareClass::<()>::class();
+        let _ = GenericDefineClass::<()>::class();
     }
 
     #[test]
     fn test_inherited_nsobject_methods_work() {
-        declare_class!(
+        define_class!(
             #[unsafe(super(NSObject))]
             #[name = "TestInheritedNSObjectMethodsWork"]
             #[derive(Debug, PartialEq, Eq, Hash)]
@@ -954,8 +953,7 @@ mod tests {
         }
 
         let mut superclass =
-            ClassBuilder::new(&c("DeclareClassDuplicateIvarSuperclass"), NSObject::class())
-                .unwrap();
+            ClassBuilder::new(&c("DefineClassDuplicateIvarSuperclass"), NSObject::class()).unwrap();
         superclass.add_ivar::<u8>(&c("ivar1"));
         superclass.add_ivar::<U128align16>(&c("ivar2"));
         superclass.add_ivar::<u8>(&c("ivar3"));
@@ -963,7 +961,7 @@ mod tests {
         let superclass = superclass.register();
 
         let mut subclass =
-            ClassBuilder::new(&c("DeclareClassDuplicateIvarSubclass"), superclass).unwrap();
+            ClassBuilder::new(&c("DefineClassDuplicateIvarSubclass"), superclass).unwrap();
         // Try to overwrite instance variables
         subclass.add_ivar::<i16>(&c("ivar1"));
         subclass.add_ivar::<usize>(&c("ivar2"));
diff --git a/crates/objc2/src/runtime/mod.rs b/crates/objc2/src/runtime/mod.rs
index bf210797c..ffde9e1c5 100644
--- a/crates/objc2/src/runtime/mod.rs
+++ b/crates/objc2/src/runtime/mod.rs
@@ -29,7 +29,7 @@ use core::ptr::{self, NonNull};
 #[doc(hidden)]
 pub mod __nsstring;
 mod bool;
-mod declare;
+mod define;
 mod malloc;
 mod message_receiver;
 mod method_encoding_iter;
@@ -53,7 +53,7 @@ use crate::{ffi, DowncastTarget, Message};
 pub use self::nsproxy::NSProxy as __NSProxy;
 
 pub use self::bool::Bool;
-pub use self::declare::{ClassBuilder, ProtocolBuilder};
+pub use self::define::{ClassBuilder, ProtocolBuilder};
 pub use self::message_receiver::MessageReceiver;
 pub use self::method_implementation::MethodImplementation;
 pub use self::nsobject::{NSObject, NSObjectProtocol};
@@ -363,7 +363,7 @@ impl Ivar {
     /// interface to the ivar.
     ///
     /// [`UnsafeCell::get`]: core::cell::UnsafeCell::get
-    /// [`ClassBuilder::add_ivar`]: crate::declare::ClassBuilder::add_ivar
+    /// [`ClassBuilder::add_ivar`]: crate::runtime::ClassBuilder::add_ivar
     ///
     ///
     /// # Panics
@@ -908,7 +908,7 @@ impl AnyClass {
         }
     }
 
-    /// Describes the instance variables declared by self.
+    /// Get a list of instance variables on the class.
     #[doc(alias = "class_copyIvarList")]
     pub fn instance_variables(&self) -> MallocSlice!(&Ivar) {
         unsafe {
@@ -1350,7 +1350,7 @@ impl AnyObject {
     }
 
     pub(crate) fn is_kind_of_class(&self, cls: &AnyClass) -> Bool {
-        // SAFETY: The signature is declared correctly.
+        // SAFETY: The signature is correct.
         //
         // Note that `isKindOfClass:` is not available on every object, but it
         // is still safe to _use_, since the runtime will simply crash if the
diff --git a/crates/objc2/src/runtime/protocol_object.rs b/crates/objc2/src/runtime/protocol_object.rs
index 87f90e840..5c7b8757b 100644
--- a/crates/objc2/src/runtime/protocol_object.rs
+++ b/crates/objc2/src/runtime/protocol_object.rs
@@ -200,7 +200,7 @@ mod tests {
     use super::*;
     use crate::runtime::{ClassBuilder, NSObject};
     use crate::{
-        declare_class, extern_methods, extern_protocol, msg_send_id, ClassType, ProtocolType,
+        define_class, extern_methods, extern_protocol, msg_send_id, ClassType, ProtocolType,
     };
 
     extern_protocol!(
@@ -251,7 +251,7 @@ mod tests {
         unsafe impl ProtocolType for dyn FooFooBar {}
     );
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "ProtocolTestsDummyClass"]
         #[derive(Debug, PartialEq, Eq, Hash)]
diff --git a/crates/objc2/src/top_level_traits.rs b/crates/objc2/src/top_level_traits.rs
index 1c2c9f843..f5dde1850 100644
--- a/crates/objc2/src/top_level_traits.rs
+++ b/crates/objc2/src/top_level_traits.rs
@@ -1,7 +1,7 @@
 use alloc::ffi::CString;
 use core::ptr::NonNull;
 
-use crate::__macro_helpers::declared_ivars::get_initialized_ivar_ptr;
+use crate::__macro_helpers::defined_ivars::get_initialized_ivar_ptr;
 use crate::encode::RefEncode;
 use crate::rc::{Allocated, Retained};
 use crate::runtime::{AnyClass, AnyProtocol, ProtocolObject};
@@ -34,10 +34,10 @@ use crate::{msg_send_id, MainThreadMarker};
 /// runtime will do so. If you need to run some code when the object is
 /// destroyed, implement the `dealloc` method instead.
 ///
-/// The [`declare_class!`] macro does this for you, but the [`extern_class!`]
+/// The [`define_class!`] macro does this for you, but the [`extern_class!`]
 /// macro fundamentally cannot.
 ///
-/// [`declare_class!`]: crate::declare_class
+/// [`define_class!`]: crate::define_class
 /// [`extern_class!`]: crate::extern_class
 ///
 ///
@@ -128,7 +128,7 @@ pub unsafe trait Message: RefEncode {
 /// a few properties of the class to the rest of the type-system.
 ///
 /// This is implemented for your type by the
-/// [`declare_class!`][crate::declare_class] and
+/// [`define_class!`][crate::define_class] and
 /// [`extern_class!`][crate::extern_class] macros.
 ///
 ///
@@ -249,7 +249,7 @@ pub unsafe trait ClassType: Message {
     ///
     /// # Panics
     ///
-    /// This may panic if something went wrong with getting or declaring the
+    /// This may panic if something went wrong with getting or creating the
     /// class, e.g. if the program is not properly linked to the framework
     /// that defines the class.
     fn class() -> &'static AnyClass;
@@ -262,7 +262,7 @@ pub unsafe trait ClassType: Message {
     #[doc(hidden)]
     const __INNER: ();
 
-    /// Inner type to use when subclassing with `declare_class!`.
+    /// Inner type to use when subclassing with `define_class!`.
     ///
     /// This is used by NSObject to control which auto traits are set for
     /// defined subclasses. Set to `= Self` in all other cases.
@@ -270,18 +270,18 @@ pub unsafe trait ClassType: Message {
     type __SubclassingType: ?Sized;
 }
 
-/// Marks types whose implementation is defined in Rust.
+/// Marks class types whose implementation is defined in Rust.
 ///
-/// This is used in [`declare_class!`], and allows access to the instance
+/// This is used in [`define_class!`], and allows access to the instance
 /// variables that a given type declares, see that macro for details.
 ///
-/// [`declare_class!`]: crate::declare_class
+/// [`define_class!`]: crate::define_class
 //
 // Note: We mark this trait as not `unsafe` for better documentation, since
-// implementing it inside `declare_class!` is not `unsafe`.
+// implementing it inside `define_class!` is not `unsafe`.
 //
 // Safety is ensured by `__UNSAFE_OFFSETS_CORRECT`.
-pub trait DeclaredClass: ClassType {
+pub trait DefinedClass: ClassType {
     /// A type representing the instance variables that this class carries.
     type Ivars: Sized;
 
@@ -380,7 +380,7 @@ pub unsafe trait ProtocolType {
     ///
     /// # Panics
     ///
-    /// This may panic if something went wrong with getting or declaring the
+    /// This may panic if something went wrong with getting or creating the
     /// protocol, e.g. if the program is not properly linked to the framework
     /// that defines the protocol.
     fn protocol() -> Option<&'static AnyProtocol> {
diff --git a/crates/objc2/src/topics/interior_mutability.md b/crates/objc2/src/topics/interior_mutability.md
index f9830787e..2411d4f7e 100644
--- a/crates/objc2/src/topics/interior_mutability.md
+++ b/crates/objc2/src/topics/interior_mutability.md
@@ -24,7 +24,7 @@ Let's take an example: We define a class that contains an [`i32`] and a [`Vec`].
 
 ```rust
 use std::cell::{Cell, RefCell};
-use objc2::{declare_class, DeclaredClass};
+use objc2::{define_class, DefinedClass};
 use objc2::runtime::NSObject;
 
 // Usually, you would just do:
@@ -50,7 +50,7 @@ struct Ivars {
     my_vec: RefCell<Vec<i32>>,
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "MyClass"]
     #[ivars = Ivars]
diff --git a/crates/objc2/src/topics/kvo.md b/crates/objc2/src/topics/kvo.md
index 8819df63b..30adc9d8e 100644
--- a/crates/objc2/src/topics/kvo.md
+++ b/crates/objc2/src/topics/kvo.md
@@ -21,7 +21,7 @@ use core::ptr;
 
 use objc2::rc::Retained;
 use objc2::runtime::AnyObject;
-use objc2::{declare_class, msg_send_id, AllocAnyThread, ClassType, DeclaredClass};
+use objc2::{define_class, msg_send_id, AllocAnyThread, ClassType, DefinedClass};
 use objc2_foundation::{
     ns_string, NSCopying, NSDictionary, NSKeyValueChangeKey, NSKeyValueObservingOptions, NSObject,
     NSObjectNSKeyValueObserverRegistration, NSObjectProtocol, NSString,
@@ -33,7 +33,7 @@ struct Ivars {
     handler: Box<dyn Fn(&NSDictionary<NSKeyValueChangeKey, AnyObject>) + 'static>,
 }
 
-declare_class!(
+define_class!(
     // SAFETY:
     // - The superclass NSObject does not have any subclassing requirements.
     // - MyObserver implements `Drop` and ensures that:
diff --git a/crates/objc2/src/topics/mvc.md b/crates/objc2/src/topics/mvc.md
index d07d0400f..c4e97dfeb 100644
--- a/crates/objc2/src/topics/mvc.md
+++ b/crates/objc2/src/topics/mvc.md
@@ -6,11 +6,11 @@ The [Model-View-Controller (MVC) design pattern][mvc-doc] is quite prominent in
 
 **View**: Use the built-in views (`NSView` or `UIView`). If you need to register a delegate on these, use the controller as the delegate.
 
-**Controller**: Use the [`declare_class!`] macro to create a new object. Use [`MainThreadOnly`] as the [`ClassType::ThreadKind`], so that you can implement view delegate protocols.
+**Controller**: Use the [`define_class!`] macro to create a new object. Use [`MainThreadOnly`] as the [`ClassType::ThreadKind`], so that you can implement view delegate protocols.
 
 [mvc-doc]: https://developer.apple.com/library/archive/documentation/General/Conceptual/CocoaEncyclopedia/Model-View-Controller/Model-View-Controller.html
 [`Cell<T>`]: core::cell::Cell
 [`RefCell<T>`]: core::cell::RefCell
-[`declare_class!`]: crate::declare_class
+[`define_class!`]: crate::define_class
 [`MainThreadOnly`]: crate::MainThreadOnly
 [`ClassType::ThreadKind`]: crate::ClassType::ThreadKind
diff --git a/crates/objc2/src/topics/run_loop.md b/crates/objc2/src/topics/run_loop.md
index 460b7de5d..7ae6b2797 100644
--- a/crates/objc2/src/topics/run_loop.md
+++ b/crates/objc2/src/topics/run_loop.md
@@ -37,7 +37,7 @@ In graphical applications, the main run loop needs to be managed by the applicat
 
 ```rust, no_run
 use objc2::rc::{Allocated, Retained};
-use objc2::{declare_class, msg_send_id, ClassType, DeclaredClass, MainThreadOnly};
+use objc2::{define_class, msg_send_id, ClassType, DefinedClass, MainThreadOnly};
 use objc2_foundation::{NSNotification, NSObject, NSObjectProtocol};
 
 // Application delegate protocols happens to share a few methods,
@@ -52,7 +52,7 @@ struct AppState {
     // Whatever state you want to store in your delegate.
 }
 
-declare_class!(
+define_class!(
     // SAFETY:
     // - NSObject does not have any subclassing requirements.
     // - `AppDelegate` does not implement `Drop`.
@@ -109,7 +109,7 @@ fn main() {
 fn main() {
     // Initialize the class so that the storyboard can see it.
     //
-    // The name specified in `declare_class!`, i.e. "AppDelegate", must
+    // The name specified in `define_class!`, i.e. "AppDelegate", must
     // match what's specified in the storyboard.
     let _cls = AppDelegate::class();
     unsafe {
diff --git a/crates/objc2/tests/declare_class.rs b/crates/objc2/tests/define_class.rs
similarity index 88%
rename from crates/objc2/tests/declare_class.rs
rename to crates/objc2/tests/define_class.rs
index d49296410..1bf6a111c 100644
--- a/crates/objc2/tests/declare_class.rs
+++ b/crates/objc2/tests/define_class.rs
@@ -6,7 +6,7 @@ use std::panic::{RefUnwindSafe, UnwindSafe};
 
 use objc2::rc::Retained;
 use objc2::runtime::NSObject;
-use objc2::{declare_class, extern_methods, sel, ClassType, MainThreadOnly};
+use objc2::{define_class, extern_methods, sel, ClassType, MainThreadOnly};
 use static_assertions::{assert_impl_all, assert_not_impl_any};
 
 // Test that adding the `deprecated` attribute does not mean that warnings
@@ -16,7 +16,7 @@ fn allow_deprecated() {
     #![deny(deprecated)]
 
     // Test allow propagates to impls
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "AllowDeprecated"]
         #[deprecated]
@@ -34,18 +34,18 @@ fn allow_deprecated() {
     let _ = AllowDeprecated::class();
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
-    #[name = "DeclareClassDeprecatedMethod"]
-    struct DeclareClassDeprecatedMethod;
+    #[name = "DefineClassDeprecatedMethod"]
+    struct DefineClassDeprecatedMethod;
 
     #[deprecated]
-    unsafe impl DeclareClassDeprecatedMethod {
+    unsafe impl DefineClassDeprecatedMethod {
         #[method(deprecatedOnImpl)]
         fn deprecated_on_impl() {}
     }
 
-    unsafe impl DeclareClassDeprecatedMethod {
+    unsafe impl DefineClassDeprecatedMethod {
         #[deprecated]
         #[method(deprecatedOnMethod)]
         fn deprecated_on_method() {}
@@ -54,7 +54,7 @@ declare_class!(
 
 #[test]
 fn test_deprecated() {
-    let _cls = DeclareClassDeprecatedMethod::class();
+    let _cls = DefineClassDeprecatedMethod::class();
 }
 
 #[test]
@@ -62,7 +62,7 @@ fn cfg() {
     // Test `cfg`. We use `debug_assertions` here because it's something that we
     // know our CI already tests.
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "OnlyOnDebugAssertions"]
         #[cfg(debug_assertions)]
@@ -72,7 +72,7 @@ fn cfg() {
     #[cfg(debug_assertions)]
     let _ = OnlyOnDebugAssertions::class();
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "NeverOnDebugAssertions"]
         #[cfg(not(debug_assertions))]
@@ -84,12 +84,12 @@ fn cfg() {
 }
 
 // Test that `cfg` in methods.
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
-    #[name = "DeclareClassCfg"]
-    struct DeclareClassCfg;
+    #[name = "DefineClassCfg"]
+    struct DefineClassCfg;
 
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[cfg(debug_assertions)]
         #[method(changesOnCfg1)]
         fn _changes_on_cfg1() -> i32 {
@@ -112,7 +112,7 @@ declare_class!(
     }
 
     #[cfg(debug_assertions)]
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method(changesOnCfg2)]
         fn _changes_on_cfg2(&self) -> i32 {
             1
@@ -123,7 +123,7 @@ declare_class!(
     }
 
     #[cfg(not(debug_assertions))]
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method(changesOnCfg2)]
         fn _changes_on_cfg2(&self) -> i32 {
             2
@@ -134,7 +134,7 @@ declare_class!(
     }
 
     #[cfg(debug_assertions)]
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[cfg(not(debug_assertions))]
         #[method(never)]
         fn _never(&self) {}
@@ -146,12 +146,12 @@ declare_class!(
 );
 
 extern_methods!(
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method_id(new)]
         fn new() -> Retained<Self>;
     }
 
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method(changesOnCfg1)]
         fn changes_on_cfg1() -> i32;
 
@@ -168,13 +168,13 @@ extern_methods!(
     }
 
     #[cfg(debug_assertions)]
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method(onlyWhenEnabled2)]
         fn only_when_enabled2();
     }
 
     #[cfg(not(debug_assertions))]
-    unsafe impl DeclareClassCfg {
+    unsafe impl DefineClassCfg {
         #[method(onlyWhenDisabled2)]
         fn only_when_disabled2();
     }
@@ -183,18 +183,18 @@ extern_methods!(
 #[test]
 fn test_method_that_changes_based_on_cfg() {
     let expected = if cfg!(debug_assertions) { 1 } else { 2 };
-    let actual = DeclareClassCfg::changes_on_cfg1();
+    let actual = DefineClassCfg::changes_on_cfg1();
     assert_eq!(expected, actual, "changes_on_cfg1");
 
-    let actual = DeclareClassCfg::new().changes_on_cfg2();
+    let actual = DefineClassCfg::new().changes_on_cfg2();
     assert_eq!(expected, actual, "changes_on_cfg2");
 }
 
 #[test]
 fn test_method_that_is_only_available_based_on_cfg() {
-    let cls = DeclareClassCfg::class();
+    let cls = DefineClassCfg::class();
     let metacls = cls.metaclass();
-    let obj = DeclareClassCfg::new();
+    let obj = DefineClassCfg::new();
 
     #[cfg(debug_assertions)]
     {
@@ -202,7 +202,7 @@ fn test_method_that_is_only_available_based_on_cfg() {
         assert!(!metacls.responds_to(sel!(onlyWhenDisabled2)));
 
         obj.only_when_enabled1();
-        DeclareClassCfg::only_when_enabled2();
+        DefineClassCfg::only_when_enabled2();
     }
     #[cfg(not(debug_assertions))]
     {
@@ -210,19 +210,19 @@ fn test_method_that_is_only_available_based_on_cfg() {
         assert!(!metacls.responds_to(sel!(onlyWhenEnabled2)));
 
         obj.only_when_disabled1();
-        DeclareClassCfg::only_when_disabled2();
+        DefineClassCfg::only_when_disabled2();
     }
 }
 
 #[test]
 fn test_method_that_is_never_available() {
-    let cls = DeclareClassCfg::class();
+    let cls = DefineClassCfg::class();
     let metacls = cls.metaclass();
     assert!(!cls.responds_to(sel!(never)));
     assert!(!metacls.responds_to(sel!(never)));
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "TestMultipleColonSelector"]
     struct TestMultipleColonSelector;
@@ -291,12 +291,12 @@ fn test_multiple_colon_selector() {
     assert!(obj.test_object(1, 2, 3, ptr::null()).is_none());
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
-    #[name = "DeclareClassAllTheBool"]
-    struct DeclareClassAllTheBool;
+    #[name = "DefineClassAllTheBool"]
+    struct DefineClassAllTheBool;
 
-    unsafe impl DeclareClassAllTheBool {
+    unsafe impl DefineClassAllTheBool {
         #[method(returnsBool)]
         fn returns_bool() -> bool {
             true
@@ -347,16 +347,16 @@ declare_class!(
 
 #[test]
 fn test_all_the_bool() {
-    let _ = DeclareClassAllTheBool::class();
+    let _ = DefineClassAllTheBool::class();
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
-    #[name = "DeclareClassUnreachable"]
-    struct DeclareClassUnreachable;
+    #[name = "DefineClassUnreachable"]
+    struct DefineClassUnreachable;
 
     // Ensure none of these warn
-    unsafe impl DeclareClassUnreachable {
+    unsafe impl DefineClassUnreachable {
         #[method(unreachable)]
         fn unreachable(&self) -> bool {
             unreachable!()
@@ -391,10 +391,10 @@ declare_class!(
 
 #[test]
 fn test_unreachable() {
-    let _ = DeclareClassUnreachable::class();
+    let _ = DefineClassUnreachable::class();
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "OutParam"]
     #[derive(Debug)]
@@ -435,7 +435,7 @@ extern_methods!(
 );
 
 #[test]
-#[should_panic = "`&mut Retained<_>` is not supported in `declare_class!` yet"]
+#[should_panic = "`&mut Retained<_>` is not supported in `define_class!` yet"]
 #[cfg_attr(
     feature = "gnustep-1-7",
     ignore = "unwinding seems to not work properly here"
@@ -446,7 +446,7 @@ fn out_param1() {
 }
 
 #[test]
-#[should_panic = "`Option<&mut Retained<_>>` is not supported in `declare_class!` yet"]
+#[should_panic = "`Option<&mut Retained<_>>` is not supported in `define_class!` yet"]
 #[cfg_attr(
     feature = "gnustep-1-7",
     ignore = "unwinding seems to not work properly here"
@@ -456,7 +456,7 @@ fn out_param2() {
 }
 
 #[test]
-#[should_panic = "`&mut Option<Retained<_>>` is not supported in `declare_class!` yet"]
+#[should_panic = "`&mut Option<Retained<_>>` is not supported in `define_class!` yet"]
 #[cfg_attr(
     feature = "gnustep-1-7",
     ignore = "unwinding seems to not work properly here"
@@ -467,7 +467,7 @@ fn out_param3() {
 }
 
 #[test]
-#[should_panic = "`Option<&mut Option<Retained<_>>>` is not supported in `declare_class!` yet"]
+#[should_panic = "`Option<&mut Option<Retained<_>>>` is not supported in `define_class!` yet"]
 #[cfg_attr(
     feature = "gnustep-1-7",
     ignore = "unwinding seems to not work properly here"
@@ -478,7 +478,7 @@ fn out_param4() {
 
 #[test]
 fn test_pointer_receiver_allowed() {
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "PointerReceiver"]
         #[derive(Debug)]
@@ -519,13 +519,13 @@ fn test_auto_traits() {
 
     // Superclass propagates.
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "NonThreadSafeHelper"]
         #[ivars = (NotSend, NotSync, NotUnwindSafe)]
         struct NonThreadSafeHelper;
     );
-    declare_class!(
+    define_class!(
         #[unsafe(super(NonThreadSafeHelper))]
         #[name = "InheritsCustomWithNonSendIvar"]
         #[ivars = ()]
@@ -536,7 +536,7 @@ fn test_auto_traits() {
 
     // Main thread only. Not Send + Sync.
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[thread_kind = MainThreadOnly]
         #[name = "InheritsNSObjectMainThreadOnly"]
@@ -549,7 +549,7 @@ fn test_auto_traits() {
 
     // NSObject is special.
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "InheritsNSObject"]
         #[ivars = ()]
@@ -559,7 +559,7 @@ fn test_auto_traits() {
     assert_impl_all!(InheritsNSObject: Send, Sync, UnwindSafe, RefUnwindSafe);
     assert_not_impl_any!(InheritsNSObject: Unpin);
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "InheritsNSObjectWithNonSendIvar"]
         #[ivars = NotSend]
@@ -569,7 +569,7 @@ fn test_auto_traits() {
     assert_impl_all!(InheritsNSObjectWithNonSendIvar: Sync, UnwindSafe, RefUnwindSafe);
     assert_not_impl_any!(InheritsNSObjectWithNonSendIvar: Unpin, Send);
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "InheritsNSObjectWithNonSyncIvar"]
         #[ivars = NotSync]
@@ -579,7 +579,7 @@ fn test_auto_traits() {
     assert_impl_all!(InheritsNSObjectWithNonSyncIvar: Send, UnwindSafe, RefUnwindSafe);
     assert_not_impl_any!(InheritsNSObjectWithNonSyncIvar: Unpin, Sync);
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
         #[name = "InheritsNSObjectWithNonUnwindSafeIvar"]
         #[ivars = NotUnwindSafe]
diff --git a/crates/objc2/tests/declare_class_self.rs b/crates/objc2/tests/define_class_self.rs
similarity index 95%
rename from crates/objc2/tests/declare_class_self.rs
rename to crates/objc2/tests/define_class_self.rs
index bf98eda9b..5916f1e50 100644
--- a/crates/objc2/tests/declare_class_self.rs
+++ b/crates/objc2/tests/define_class_self.rs
@@ -1,9 +1,9 @@
-//! To remind myself that `Self` needs to work in methods in `declare_class!`,
+//! To remind myself that `Self` needs to work in methods in `define_class!`,
 //! and hence whenever we name any of the types involved in this, we need to
 //! do it in a context where `Self` works.
 use objc2::rc::{Allocated, Retained};
 use objc2::runtime::NSObject;
-use objc2::{declare_class, ClassType};
+use objc2::{define_class, ClassType};
 
 trait GetSameType {
     type SameType: ?Sized;
@@ -27,7 +27,7 @@ macro_rules! get_self {
     };
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "MyTestObject"]
     struct MyTestObject;
diff --git a/crates/objc2/tests/macros_mainthreadmarker.rs b/crates/objc2/tests/macros_mainthreadmarker.rs
index 3a4c2612c..cb7915ef3 100644
--- a/crates/objc2/tests/macros_mainthreadmarker.rs
+++ b/crates/objc2/tests/macros_mainthreadmarker.rs
@@ -1,6 +1,6 @@
 use objc2::rc::Retained;
 use objc2::runtime::{NSObject, NSObjectProtocol};
-use objc2::{declare_class, extern_methods, extern_protocol, ProtocolType};
+use objc2::{define_class, extern_methods, extern_protocol, ProtocolType};
 
 extern_protocol!(
     #[allow(clippy::missing_safety_doc)]
@@ -17,7 +17,7 @@ extern_protocol!(
     }
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "MainThreadMarkerTest"]
     #[derive(PartialEq, Eq, Hash, Debug)]
diff --git a/crates/objc2/tests/no_prelude.rs b/crates/objc2/tests/no_prelude.rs
index faff4c605..d1303afd4 100644
--- a/crates/objc2/tests/no_prelude.rs
+++ b/crates/objc2/tests/no_prelude.rs
@@ -90,7 +90,7 @@ struct MyCustomIvars {
     ivars: i32,
 }
 
-new_objc2::declare_class!(
+new_objc2::define_class!(
     #[unsafe(super(new_objc2::runtime::NSObject))]
     #[name = "CustomObject"]
     #[ivars = MyCustomIvars]
diff --git a/crates/objc2/tests/track_caller.rs b/crates/objc2/tests/track_caller.rs
index 3b3380993..28ac67b8a 100644
--- a/crates/objc2/tests/track_caller.rs
+++ b/crates/objc2/tests/track_caller.rs
@@ -10,7 +10,7 @@ use std::sync::Mutex;
 use objc2::encode::Encode;
 use objc2::rc::{self, Allocated, Retained};
 use objc2::runtime::{self, NSObject};
-use objc2::{class, declare_class, msg_send, msg_send_id, AllocAnyThread, ClassType};
+use objc2::{class, define_class, msg_send, msg_send_id, AllocAnyThread, ClassType};
 
 #[path = "../src/rc/test_object.rs"]
 #[allow(dead_code)]
@@ -199,7 +199,7 @@ fn test_catch_all(checker: &PanicChecker) {
     });
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "PanickingClass"]
     struct PanickingClass;
diff --git a/crates/objc2/tests/use_macros.rs b/crates/objc2/tests/use_macros.rs
index 5565ee304..0be76ef32 100644
--- a/crates/objc2/tests/use_macros.rs
+++ b/crates/objc2/tests/use_macros.rs
@@ -1,7 +1,7 @@
 use objc2::runtime::{AnyClass, NSObject};
-use objc2::{class, declare_class, msg_send, sel};
+use objc2::{class, define_class, msg_send, sel};
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "MyObject"]
     pub struct MyObject;
diff --git a/crates/test-assembly/crates/test_declare_class/Cargo.toml b/crates/test-assembly/crates/test_define_class/Cargo.toml
similarity index 97%
rename from crates/test-assembly/crates/test_declare_class/Cargo.toml
rename to crates/test-assembly/crates/test_define_class/Cargo.toml
index f6e4a67a7..965560087 100644
--- a/crates/test-assembly/crates/test_declare_class/Cargo.toml
+++ b/crates/test-assembly/crates/test_define_class/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "test_declare_class"
+name = "test_define_class"
 version = "0.1.0"
 edition.workspace = true
 publish = false
diff --git a/crates/test-assembly/crates/test_declare_class/expected/apple-aarch64.s b/crates/test-assembly/crates/test_define_class/expected/apple-aarch64.s
similarity index 74%
rename from crates/test-assembly/crates/test_declare_class/expected/apple-aarch64.s
rename to crates/test-assembly/crates/test_define_class/expected/apple-aarch64.s
index 5733cc7ab..fe4d32e9e 100644
--- a/crates/test-assembly/crates/test_declare_class/expected/apple-aarch64.s
+++ b/crates/test-assembly/crates/test_define_class/expected/apple-aarch64.s
@@ -1,6 +1,6 @@
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	2
-SYM(objc2[CRATE_ID]::__macro_helpers::declared_ivars::dealloc::<test_declare_class[CRATE_ID]::DropIvars>, 0):
+SYM(objc2[CRATE_ID]::__macro_helpers::defined_ivars::dealloc::<test_define_class[CRATE_ID]::DropIvars>, 0):
 Lfunc_begin0:
 	sub	sp, sp, #64
 	stp	x22, x21, [sp, #16]
@@ -10,19 +10,19 @@ Lfunc_begin0:
 	mov	x19, x1
 	mov	x20, x0
 Lloh0:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
 Lloh1:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
 	ldrb	w8, [x0, x8]
 	cbz	w8, LBB0_6
 	cmp	w8, #255
 	b.ne	LBB0_3
-	bl	SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
+	bl	SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
 LBB0_3:
 Lloh2:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
 Lloh3:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
 	add	x8, x20, x8
 	ldp	x0, x21, [x8]
 Ltmp0:
@@ -106,7 +106,7 @@ Lttbase0:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	2
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin1:
 	sub	sp, sp, #48
 	stp	x20, x19, [sp, #16]
@@ -131,12 +131,12 @@ Lloh12:
 Lloh13:
 	add	x3, x3, l_anon.[ID].15@PAGEOFF
 	mov	w1, #7
-	bl	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	str	x0, [sp, #8]
 Lloh14:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036@PAGE
 Lloh15:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036@PAGEOFF]
 Ltmp6:
 Lloh16:
 	adrp	x4, l_anon.[ID].16@PAGE
@@ -149,12 +149,12 @@ Lloh19:
 	add	x0, sp, #8
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_class_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_class_method_inner::GENERATED_ID, 0)
 Ltmp7:
 Lloh20:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_94f56691766f024b@PAGE
 Lloh21:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_94f56691766f024b@PAGEOFF]
 Ltmp8:
 Lloh22:
 	adrp	x4, l_anon.[ID].3@PAGE
@@ -167,12 +167,12 @@ Lloh25:
 	add	x0, sp, #8
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp9:
 Lloh26:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f@PAGE
 Lloh27:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f@PAGEOFF]
 Ltmp10:
 Lloh28:
 	adrp	x2, l_anon.[ID].17@PAGE
@@ -185,12 +185,12 @@ Lloh31:
 	add	x0, sp, #8
 	mov	w3, #1
 	mov	x4, x2
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp11:
 Lloh32:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195@PAGE
 Lloh33:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195@PAGEOFF]
 Ltmp12:
 Lloh34:
 	adrp	x4, l_anon.[ID].18@PAGE
@@ -203,12 +203,12 @@ Lloh37:
 	add	x0, sp, #8
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp13:
 Lloh38:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853@PAGE
 Lloh39:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853@PAGEOFF]
 Ltmp14:
 Lloh40:
 	adrp	x2, l_anon.[ID].17@PAGE
@@ -224,7 +224,7 @@ Lloh45:
 	add	x5, x5, _method_retained_with_param@PAGEOFF
 	add	x0, sp, #8
 	mov	w3, #1
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp15:
 Ltmp16:
 Lloh46:
@@ -253,9 +253,9 @@ Ltmp19:
 	bl	_class_addProtocol
 LBB1_12:
 Lloh50:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_8e8381168048230b@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f@PAGE
 Lloh51:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_8e8381168048230b@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f@PAGEOFF]
 Ltmp20:
 Lloh52:
 	adrp	x2, l_anon.[ID].23@PAGE
@@ -271,7 +271,7 @@ Lloh57:
 	add	x5, x5, _copyWithZone@PAGEOFF
 	add	x0, sp, #8
 	mov	w3, #1
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp21:
 	ldr	x19, [sp, #8]
 	mov	x0, x19
@@ -348,7 +348,7 @@ Lcst_end1:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	2
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin2:
 	sub	sp, sp, #96
 	stp	x20, x19, [sp, #64]
@@ -373,7 +373,7 @@ Lloh65:
 Lloh66:
 	add	x3, x3, l_anon.[ID].25@PAGEOFF
 	mov	w1, #9
-	bl	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	str	x0, [sp, #24]
 Lloh67:
 	adrp	x8, L_OBJC_SELECTOR_REFERENCES_dealloc@GOTPAGE
@@ -387,13 +387,13 @@ Lloh70:
 Lloh71:
 	add	x4, x4, l_anon.[ID].3@PAGEOFF
 Lloh72:
-	adrp	x5, SYM(objc2[CRATE_ID]::__macro_helpers::declared_ivars::dealloc::<test_declare_class[CRATE_ID]::DropIvars>, 0)@PAGE
+	adrp	x5, SYM(objc2[CRATE_ID]::__macro_helpers::defined_ivars::dealloc::<test_define_class[CRATE_ID]::DropIvars>, 0)@PAGE
 Lloh73:
-	add	x5, x5, SYM(objc2[CRATE_ID]::__macro_helpers::declared_ivars::dealloc::<test_declare_class[CRATE_ID]::DropIvars>, 0)@PAGEOFF
+	add	x5, x5, SYM(objc2[CRATE_ID]::__macro_helpers::defined_ivars::dealloc::<test_define_class[CRATE_ID]::DropIvars>, 0)@PAGEOFF
 	add	x0, sp, #24
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp24:
 	ldr	x8, [sp, #24]
 	str	x8, [sp, #8]
@@ -415,7 +415,7 @@ Lloh80:
 	add	x0, sp, #8
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp27:
 	ldr	x8, [sp, #8]
 	str	x8, [sp, #16]
@@ -437,7 +437,7 @@ Lloh84:
 	mov	w2, #6
 	mov	w3, #16
 	mov	w4, #3
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp30:
 Ltmp31:
 Lloh85:
@@ -452,7 +452,7 @@ Lloh88:
 	mov	w2, #10
 	mov	w3, #1
 	mov	w4, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp32:
 	ldr	x19, [sp, #16]
 	mov	x0, x19
@@ -478,11 +478,11 @@ Lloh93:
 	adrp	x8, __MergedGlobals@PAGE+32
 	str	x19, [x8, __MergedGlobals@PAGEOFF+32]
 Lloh94:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
-	str	x20, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
+	str	x20, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
 Lloh95:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
-	str	x0, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
+	str	x0, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
 	ldp	x29, x30, [sp, #80]
 	ldp	x20, x19, [sp, #64]
 	add	sp, sp, #96
@@ -494,9 +494,9 @@ Lloh97:
 	add	x0, x0, l_anon.[ID].12@PAGEOFF
 	bl	SYM(core::option::unwrap_failed::GENERATED_ID, 0)
 LBB2_9:
-	bl	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
 LBB2_10:
-	bl	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_drop_flag_failed::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_drop_flag_failed::GENERATED_ID, 0)
 LBB2_11:
 Ltmp28:
 	mov	x19, x0
@@ -574,7 +574,7 @@ Lcst_end2:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	2
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin3:
 	sub	sp, sp, #96
 	stp	x20, x19, [sp, #64]
@@ -599,7 +599,7 @@ Lloh103:
 Lloh104:
 	add	x3, x3, l_anon.[ID].24@PAGEOFF
 	mov	w1, #15
-	bl	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	str	x0, [sp, #8]
 Lloh105:
 	adrp	x8, L_OBJC_SELECTOR_REFERENCES_init@GOTPAGE
@@ -619,7 +619,7 @@ Lloh111:
 	add	x0, sp, #8
 	mov	w2, #8
 	mov	x3, #0
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp35:
 	ldr	x8, [sp, #8]
 	str	x8, [sp, #16]
@@ -641,7 +641,7 @@ Lloh115:
 	mov	w2, #6
 	mov	w3, #8
 	mov	w4, #2
-	bl	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	bl	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp38:
 	ldr	x19, [sp, #16]
 	mov	x0, x19
@@ -658,8 +658,8 @@ Lloh118:
 	adrp	x8, __MergedGlobals@PAGE+16
 	str	x19, [x8, __MergedGlobals@PAGEOFF+16]
 Lloh119:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
-	str	x0, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
+	str	x0, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
 	ldp	x29, x30, [sp, #80]
 	ldp	x20, x19, [sp, #64]
 	add	sp, sp, #96
@@ -671,7 +671,7 @@ Lloh121:
 	add	x0, x0, l_anon.[ID].12@PAGEOFF
 	bl	SYM(core::option::unwrap_failed::GENERATED_ID, 0)
 LBB3_6:
-	bl	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
+	bl	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
 LBB3_7:
 Ltmp39:
 	mov	x19, x0
@@ -730,40 +730,40 @@ Lcst_end3:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	2
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	sub	sp, sp, #32
 	stp	x29, x30, [sp, #16]
 	add	x29, sp, #16
 	ldr	x8, [x0]
 	str	x8, [sp, #8]
 	add	x0, sp, #8
-	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	ldp	x29, x30, [sp, #16]
 	add	sp, sp, #32
 	ret
 
 	.p2align	2
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	sub	sp, sp, #32
 	stp	x29, x30, [sp, #16]
 	add	x29, sp, #16
 	ldr	x8, [x0]
 	str	x8, [sp, #8]
 	add	x0, sp, #8
-	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	ldp	x29, x30, [sp, #16]
 	add	sp, sp, #32
 	ret
 
 	.p2align	2
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	sub	sp, sp, #32
 	stp	x29, x30, [sp, #16]
 	add	x29, sp, #16
 	ldr	x8, [x0]
 	str	x8, [sp, #8]
 	add	x0, sp, #8
-	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	bl	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	ldp	x29, x30, [sp, #16]
 	add	sp, sp, #32
 	ret
@@ -824,18 +824,18 @@ Lloh133:
 	.p2align	2
 _access_forgetable_ivars:
 Lloh134:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
 Lloh135:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
 	add	x8, x0, x8
 	ldr	w1, [x8]
 	ldrb	w0, [x8, #4]
 	ret
 	.loh AdrpLdr	Lloh134, Lloh135
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
 	.p2align	2
-SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0):
+SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0):
 	; InlineAsm Start
 	; InlineAsm End
 	ret
@@ -896,17 +896,17 @@ Lloh147:
 	.p2align	2
 _access_drop_ivars:
 Lloh148:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
 Lloh149:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
 	add	x8, x0, x8
 	ldp	x0, x1, [x8]
 	ret
 	.loh AdrpLdr	Lloh148, Lloh149
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	2
-SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
 Lloh150:
 	adrp	x8, __MergedGlobals@PAGE+8
 Lloh151:
@@ -1210,9 +1210,9 @@ Lloh199:
 	.loh AdrpAdd	Lloh196, Lloh197
 	.loh AdrpAdd	Lloh194, Lloh195
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	2
-SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
 Lloh200:
 	adrp	x8, __MergedGlobals@PAGE+24
 Lloh201:
@@ -1267,9 +1267,9 @@ Lloh211:
 _init_forgetable_ivars:
 	cbz	x0, LBB20_2
 Lloh212:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGE
 Lloh213:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)@PAGEOFF]
 	add	x8, x0, x8
 	mov	w9, #43
 	str	w9, [x8]
@@ -1280,9 +1280,9 @@ LBB20_2:
 	stp	x29, x30, [sp, #16]
 	add	x29, sp, #16
 Lloh214:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d@PAGE
 Lloh215:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d@PAGEOFF]
 Lloh216:
 	adrp	x8, L_OBJC_CLASSLIST_REFERENCES_$_NSObject@GOTPAGE
 Lloh217:
@@ -1300,9 +1300,9 @@ Lloh218:
 	.loh AdrpAdrp	Lloh214, Lloh216
 	.loh AdrpLdr	Lloh214, Lloh215
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	2
-SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
 Lloh219:
 	adrp	x8, __MergedGlobals@PAGE+40
 Lloh220:
@@ -1370,15 +1370,15 @@ Ltmp49:
 	bl	SYM(objc2::runtime::nsobject::NSObject::new::GENERATED_ID, 0)
 Ltmp50:
 	mov	x21, x0
-	adrp	x22, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
+	adrp	x22, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGE
 	cbz	x19, LBB22_4
 Lloh231:
-	adrp	x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
+	adrp	x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGE
 Lloh232:
-	ldr	x8, [x8, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x8, SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)@PAGEOFF]
 	add	x8, x19, x8
 	stp	x20, x21, [x8]
-	ldr	x8, [x22, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x22, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
 	mov	w9, #15
 	strb	w9, [x19, x8]
 	b	LBB22_6
@@ -1391,9 +1391,9 @@ Ltmp58:
 	bl	_objc_release
 LBB22_6:
 Lloh233:
-	adrp	x8, L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d@PAGE
+	adrp	x8, L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f@PAGE
 Lloh234:
-	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d@PAGEOFF]
+	ldr	x1, [x8, L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f@PAGEOFF]
 Lloh235:
 	adrp	x8, L_OBJC_CLASSLIST_REFERENCES_$_NSObject@GOTPAGE
 Lloh236:
@@ -1404,7 +1404,7 @@ Lloh237:
 	mov	x0, sp
 	bl	_objc_msgSendSuper
 	cbz	x0, LBB22_8
-	ldr	x8, [x22, SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
+	ldr	x8, [x22, SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)@PAGEOFF]
 	mov	w9, #255
 	strb	w9, [x0, x8]
 LBB22_8:
@@ -1503,20 +1503,20 @@ Lttbase2:
 	.p2align	3, 0x0
 l_anon.[ID].0:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.p2align	3, 0x0
 l_anon.[ID].1:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.p2align	3, 0x0
 l_anon.[ID].2:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.section	__TEXT,__const
 	.p2align	3, 0x0
@@ -1564,10 +1564,10 @@ l_anon.[ID].12:
 l_anon.[ID].13:
 	.ascii	"NoIvars"
 
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1),8,3
 l_anon.[ID].14:
 	.ascii	"crates/$DIR/lib.rs"
 
@@ -1575,7 +1575,7 @@ l_anon.[ID].14:
 	.p2align	3, 0x0
 l_anon.[ID].15:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000\016\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000\016\000\000\000\001\000\000"
 
 	.section	__TEXT,__const
 	.p2align	3, 0x0
@@ -1622,159 +1622,159 @@ l_anon.[ID].23:
 	.space	24
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_4534bbe5e50290a1
-L_OBJC_METH_VAR_NAME_4534bbe5e50290a1:
+	.globl	L_OBJC_METH_VAR_NAME_4ee60abb2719f036
+L_OBJC_METH_VAR_NAME_4ee60abb2719f036:
 	.asciz	"classMethod"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1
+	.globl	L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1:
-	.quad	L_OBJC_METH_VAR_NAME_4534bbe5e50290a1
+L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036:
+	.quad	L_OBJC_METH_VAR_NAME_4ee60abb2719f036
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_4534bbe5e50290a1
+	.globl	L_OBJC_IMAGE_INFO_4ee60abb2719f036
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_4534bbe5e50290a1:
+L_OBJC_IMAGE_INFO_4ee60abb2719f036:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_885f02de2bcfda61
-L_OBJC_METH_VAR_NAME_885f02de2bcfda61:
+	.globl	L_OBJC_METH_VAR_NAME_94f56691766f024b
+L_OBJC_METH_VAR_NAME_94f56691766f024b:
 	.asciz	"method"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61
+	.globl	L_OBJC_SELECTOR_REFERENCES_94f56691766f024b
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61:
-	.quad	L_OBJC_METH_VAR_NAME_885f02de2bcfda61
+L_OBJC_SELECTOR_REFERENCES_94f56691766f024b:
+	.quad	L_OBJC_METH_VAR_NAME_94f56691766f024b
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_885f02de2bcfda61
+	.globl	L_OBJC_IMAGE_INFO_94f56691766f024b
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_885f02de2bcfda61:
+L_OBJC_IMAGE_INFO_94f56691766f024b:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_22190004c3782bc8
-L_OBJC_METH_VAR_NAME_22190004c3782bc8:
+	.globl	L_OBJC_METH_VAR_NAME_d6661a0373fc878f
+L_OBJC_METH_VAR_NAME_d6661a0373fc878f:
 	.asciz	"methodBool:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8
+	.globl	L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8:
-	.quad	L_OBJC_METH_VAR_NAME_22190004c3782bc8
+L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f:
+	.quad	L_OBJC_METH_VAR_NAME_d6661a0373fc878f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_22190004c3782bc8
+	.globl	L_OBJC_IMAGE_INFO_d6661a0373fc878f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_22190004c3782bc8:
+L_OBJC_IMAGE_INFO_d6661a0373fc878f:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_384873ae30ec6d43
-L_OBJC_METH_VAR_NAME_384873ae30ec6d43:
+	.globl	L_OBJC_METH_VAR_NAME_8677be6883ccd195
+L_OBJC_METH_VAR_NAME_8677be6883ccd195:
 	.asciz	"methodRetained"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43
+	.globl	L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43:
-	.quad	L_OBJC_METH_VAR_NAME_384873ae30ec6d43
+L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195:
+	.quad	L_OBJC_METH_VAR_NAME_8677be6883ccd195
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_384873ae30ec6d43
+	.globl	L_OBJC_IMAGE_INFO_8677be6883ccd195
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_384873ae30ec6d43:
+L_OBJC_IMAGE_INFO_8677be6883ccd195:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3
-L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3:
+	.globl	L_OBJC_METH_VAR_NAME_3f5c953c5f98b853
+L_OBJC_METH_VAR_NAME_3f5c953c5f98b853:
 	.asciz	"methodRetainedWithParam:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3
+	.globl	L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3:
-	.quad	L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3
+L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853:
+	.quad	L_OBJC_METH_VAR_NAME_3f5c953c5f98b853
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_56240dc6bf8dcec3
+	.globl	L_OBJC_IMAGE_INFO_3f5c953c5f98b853
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_56240dc6bf8dcec3:
+L_OBJC_IMAGE_INFO_3f5c953c5f98b853:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_8e8381168048230b
-L_OBJC_METH_VAR_NAME_8e8381168048230b:
+	.globl	L_OBJC_METH_VAR_NAME_76a1da9e60049d4f
+L_OBJC_METH_VAR_NAME_76a1da9e60049d4f:
 	.asciz	"copyWithZone:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_8e8381168048230b
+	.globl	L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_8e8381168048230b:
-	.quad	L_OBJC_METH_VAR_NAME_8e8381168048230b
+L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f:
+	.quad	L_OBJC_METH_VAR_NAME_76a1da9e60049d4f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_8e8381168048230b
+	.globl	L_OBJC_IMAGE_INFO_76a1da9e60049d4f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_8e8381168048230b:
+L_OBJC_IMAGE_INFO_76a1da9e60049d4f:
 	.asciz	"\000\000\000\000@\000\000"
 
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2),8,3
 	.section	__DATA,__const
 	.p2align	3, 0x0
 l_anon.[ID].24:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000M\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000M\000\000\000\001\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_affdf4249c01fc9d
-L_OBJC_METH_VAR_NAME_affdf4249c01fc9d:
+	.globl	L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d
+L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d:
 	.asciz	"init"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d
+	.globl	L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d:
-	.quad	L_OBJC_METH_VAR_NAME_affdf4249c01fc9d
+L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d:
+	.quad	L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_affdf4249c01fc9d
+	.globl	L_OBJC_IMAGE_INFO_8ae30338ec8fe87d
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_affdf4249c01fc9d:
+L_OBJC_IMAGE_INFO_8ae30338ec8fe87d:
 	.asciz	"\000\000\000\000@\000\000"
 
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0),8,3
 	.section	__DATA,__const
 	.p2align	3, 0x0
 l_anon.[ID].25:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000o\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000o\000\000\000\001\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d
-L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d:
+	.globl	L_OBJC_METH_VAR_NAME_c3d3047551604c9f
+L_OBJC_METH_VAR_NAME_c3d3047551604c9f:
 	.asciz	"init"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d
+	.globl	L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d:
-	.quad	L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d
+L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f:
+	.quad	L_OBJC_METH_VAR_NAME_c3d3047551604c9f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_8a88921dfbe0b09d
+	.globl	L_OBJC_IMAGE_INFO_c3d3047551604c9f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_8a88921dfbe0b09d:
+L_OBJC_IMAGE_INFO_c3d3047551604c9f:
 	.asciz	"\000\000\000\000@\000\000"
 
 .zerofill __DATA,__bss,__MergedGlobals,48,3
diff --git a/crates/test-assembly/crates/test_declare_class/expected/apple-armv7s.s b/crates/test-assembly/crates/test_define_class/expected/apple-armv7s.s
similarity index 100%
rename from crates/test-assembly/crates/test_declare_class/expected/apple-armv7s.s
rename to crates/test-assembly/crates/test_define_class/expected/apple-armv7s.s
diff --git a/crates/test-assembly/crates/test_declare_class/expected/apple-old-x86.s b/crates/test-assembly/crates/test_define_class/expected/apple-old-x86.s
similarity index 100%
rename from crates/test-assembly/crates/test_declare_class/expected/apple-old-x86.s
rename to crates/test-assembly/crates/test_define_class/expected/apple-old-x86.s
diff --git a/crates/test-assembly/crates/test_declare_class/expected/apple-x86.s b/crates/test-assembly/crates/test_define_class/expected/apple-x86.s
similarity index 100%
rename from crates/test-assembly/crates/test_declare_class/expected/apple-x86.s
rename to crates/test-assembly/crates/test_define_class/expected/apple-x86.s
diff --git a/crates/test-assembly/crates/test_declare_class/expected/apple-x86_64.s b/crates/test-assembly/crates/test_define_class/expected/apple-x86_64.s
similarity index 61%
rename from crates/test-assembly/crates/test_declare_class/expected/apple-x86_64.s
rename to crates/test-assembly/crates/test_define_class/expected/apple-x86_64.s
index f19208c3f..501681377 100644
--- a/crates/test-assembly/crates/test_declare_class/expected/apple-x86_64.s
+++ b/crates/test-assembly/crates/test_define_class/expected/apple-x86_64.s
@@ -1,7 +1,7 @@
 	.section	__TEXT,__text,regular,pure_instructions
 	.intel_syntax noprefix
 	.p2align	4, 0x90
-SYM(objc2[CRATE_ID]::__macro_helpers::declared_ivars::dealloc::<test_declare_class[CRATE_ID]::DropIvars>, 0):
+SYM(objc2[CRATE_ID]::__macro_helpers::defined_ivars::dealloc::<test_define_class[CRATE_ID]::DropIvars>, 0):
 Lfunc_begin0:
 	push	rbp
 	mov	rbp, rsp
@@ -11,15 +11,15 @@ Lfunc_begin0:
 	sub	rsp, 24
 	mov	rbx, rsi
 	mov	r14, rdi
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
 	movzx	eax, byte ptr [rdi + rax]
 	test	eax, eax
 	je	LBB0_6
 	cmp	eax, 255
 	jne	LBB0_3
-	call	SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
+	call	SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
 LBB0_3:
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
 	mov	rdi, qword ptr [r14 + rax]
 	mov	r15, qword ptr [r14 + rax + 8]
 Ltmp0:
@@ -100,7 +100,7 @@ Lttbase0:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	4, 0x90
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin1:
 	push	rbp
 	mov	rbp, rsp
@@ -115,52 +115,52 @@ Lfunc_begin1:
 	lea	rdi, [rip + l_anon.[ID].13]
 	lea	rcx, [rip + l_anon.[ID].15]
 	mov	esi, 7
-	call	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	mov	qword ptr [rbp - 16], rax
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036]
 Ltmp6:
 	lea	r8, [rip + l_anon.[ID].16]
 	lea	r9, [rip + _get_class]
 	lea	rdi, [rbp - 16]
 	mov	edx, 8
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_class_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_class_method_inner::GENERATED_ID, 0)
 Ltmp7:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_94f56691766f024b]
 Ltmp8:
 	lea	r8, [rip + l_anon.[ID].3]
 	lea	r9, [rip + _method_simple]
 	lea	rdi, [rbp - 16]
 	mov	edx, 8
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp9:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f]
 Ltmp10:
 	lea	rdx, [rip + l_anon.[ID].17]
 	lea	r9, [rip + _method_bool]
 	lea	rdi, [rbp - 16]
 	mov	ecx, 1
 	mov	r8, rdx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp11:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195]
 Ltmp12:
 	lea	r8, [rip + l_anon.[ID].18]
 	lea	r9, [rip + _method_retained]
 	lea	rdi, [rbp - 16]
 	mov	edx, 8
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp13:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853]
 Ltmp14:
 	lea	rdx, [rip + l_anon.[ID].17]
 	lea	r8, [rip + l_anon.[ID].18]
 	lea	r9, [rip + _method_retained_with_param]
 	lea	rdi, [rbp - 16]
 	mov	ecx, 1
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp15:
 Ltmp16:
 	lea	rdi, [rip + L_anon.[ID].19]
@@ -184,19 +184,19 @@ Ltmp19:
 	mov	rsi, rax
 	call	_class_addProtocol
 LBB1_12:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_8e8381168048230b]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f]
 Ltmp20:
 	lea	rdx, [rip + l_anon.[ID].23]
 	lea	r8, [rip + l_anon.[ID].18]
 	lea	r9, [rip + _copyWithZone]
 	lea	rdi, [rbp - 16]
 	mov	ecx, 1
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp21:
 	mov	rbx, qword ptr [rbp - 16]
 	mov	rdi, rbx
 	call	_objc_registerClassPair
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0], rbx
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0], rbx
 	add	rsp, 8
 	pop	rbx
 	pop	rbp
@@ -238,7 +238,7 @@ Lcst_end1:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	4, 0x90
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin2:
 	push	rbp
 	mov	rbp, rsp
@@ -254,18 +254,18 @@ Lfunc_begin2:
 	lea	rdi, [rip + l_anon.[ID].10]
 	lea	rcx, [rip + l_anon.[ID].25]
 	mov	esi, 9
-	call	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	mov	qword ptr [rbp - 72], rax
 	mov	rax, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_dealloc@GOTPCREL]
 	mov	rsi, qword ptr [rax]
 Ltmp23:
 	lea	r8, [rip + l_anon.[ID].3]
-	lea	r9, [rip + SYM(objc2[CRATE_ID]::__macro_helpers::declared_ivars::dealloc::<test_declare_class[CRATE_ID]::DropIvars>, 0)]
+	lea	r9, [rip + SYM(objc2[CRATE_ID]::__macro_helpers::defined_ivars::dealloc::<test_define_class[CRATE_ID]::DropIvars>, 0)]
 	lea	rbx, [rbp - 72]
 	mov	edx, 8
 	mov	rdi, rbx
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp24:
 	mov	rax, qword ptr [rbp - 72]
 	mov	qword ptr [rbp - 32], rax
@@ -278,7 +278,7 @@ Ltmp26:
 	mov	edx, 8
 	mov	rdi, rbx
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp27:
 	mov	rax, qword ptr [rbp - 32]
 	mov	qword ptr [rbp - 24], rax
@@ -294,7 +294,7 @@ Ltmp29:
 	mov	ecx, 16
 	mov	rdi, rbx
 	mov	r8d, 3
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp30:
 Ltmp31:
 	lea	rsi, [rip + l_anon.[ID].5]
@@ -303,7 +303,7 @@ Ltmp31:
 	mov	edx, 10
 	mov	ecx, 1
 	xor	r8d, r8d
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp32:
 	mov	rbx, qword ptr [rbp - 24]
 	mov	rdi, rbx
@@ -323,9 +323,9 @@ Ltmp32:
 	je	LBB2_10
 	mov	rdi, rax
 	call	_ivar_getOffset
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0], rbx
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)], r14
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)], rax
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0], rbx
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)], r14
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)], rax
 	add	rsp, 64
 	pop	rbx
 	pop	r14
@@ -335,9 +335,9 @@ LBB2_14:
 	lea	rdi, [rip + l_anon.[ID].12]
 	call	SYM(core::option::unwrap_failed::GENERATED_ID, 0)
 LBB2_6:
-	call	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
 LBB2_10:
-	call	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_drop_flag_failed::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_drop_flag_failed::GENERATED_ID, 0)
 LBB2_12:
 Ltmp28:
 	jmp	LBB2_8
@@ -387,7 +387,7 @@ Lcst_end2:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	4, 0x90
-SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
+SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0):
 Lfunc_begin3:
 	push	rbp
 	mov	rbp, rsp
@@ -403,7 +403,7 @@ Lfunc_begin3:
 	lea	rdi, [rip + l_anon.[ID].9]
 	lea	rcx, [rip + l_anon.[ID].24]
 	mov	esi, 15
-	call	SYM(objc2::__macro_helpers::declare_class::create_builder::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::define_class::create_builder::GENERATED_ID, 0)
 	mov	qword ptr [rbp - 24], rax
 	mov	rax, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_init@GOTPCREL]
 	mov	rsi, qword ptr [rax]
@@ -414,7 +414,7 @@ Ltmp34:
 	mov	edx, 8
 	mov	rdi, rbx
 	xor	ecx, ecx
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_method_inner::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_method_inner::GENERATED_ID, 0)
 Ltmp35:
 	mov	rax, qword ptr [rbp - 24]
 	mov	qword ptr [rbp - 32], rax
@@ -430,7 +430,7 @@ Ltmp37:
 	mov	ecx, 8
 	mov	rdi, rbx
 	mov	r8d, 2
-	call	SYM(objc2::runtime::declare::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
+	call	SYM(objc2::runtime::define::ClassBuilder::add_ivar_inner_mono::GENERATED_ID, 0)
 Ltmp38:
 	mov	rbx, qword ptr [rbp - 32]
 	mov	rdi, rbx
@@ -442,8 +442,8 @@ Ltmp38:
 	je	LBB3_4
 	mov	rdi, rax
 	call	_ivar_getOffset
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0], rbx
-	mov	qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)], rax
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0], rbx
+	mov	qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)], rax
 	add	rsp, 64
 	pop	rbx
 	pop	r14
@@ -453,7 +453,7 @@ LBB3_9:
 	lea	rdi, [rip + l_anon.[ID].12]
 	call	SYM(core::option::unwrap_failed::GENERATED_ID, 0)
 LBB3_4:
-	call	SYM(objc2::__macro_helpers::declared_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
+	call	SYM(objc2::__macro_helpers::defined_ivars::register_with_ivars::get_ivar_failed::GENERATED_ID, 0)
 LBB3_5:
 Ltmp39:
 	jmp	LBB3_6
@@ -496,40 +496,40 @@ Lcst_end3:
 
 	.section	__TEXT,__text,regular,pure_instructions
 	.p2align	4, 0x90
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
 	mov	rax, qword ptr [rdi]
 	mov	qword ptr [rbp - 8], rax
 	lea	rdi, [rbp - 8]
-	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	add	rsp, 16
 	pop	rbp
 	ret
 
 	.p2align	4, 0x90
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
 	mov	rax, qword ptr [rdi]
 	mov	qword ptr [rbp - 8], rax
 	lea	rdi, [rbp - 8]
-	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	add	rsp, 16
 	pop	rbp
 	ret
 
 	.p2align	4, 0x90
-SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
+SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0):
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
 	mov	rax, qword ptr [rdi]
 	mov	qword ptr [rbp - 8], rax
 	lea	rdi, [rbp - 8]
-	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	call	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 	add	rsp, 16
 	pop	rbp
 	ret
@@ -537,10 +537,10 @@ SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]:
 	.globl	_access_forgetable_ivars_class
 	.p2align	4, 0x90
 _access_forgetable_ivars_class:
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB7_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
 	ret
 LBB7_1:
 	push	rbp
@@ -549,7 +549,7 @@ LBB7_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].2]
 	lea	r8, [rip + l_anon.[ID].24]
 	lea	rdx, [rbp - 16]
@@ -557,7 +557,7 @@ LBB7_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
 	ret
 
 	.globl	_access_forgetable_ivars
@@ -565,15 +565,15 @@ LBB7_1:
 _access_forgetable_ivars:
 	push	rbp
 	mov	rbp, rsp
-	mov	rcx, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)]
+	mov	rcx, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)]
 	movzx	eax, byte ptr [rdi + rcx + 4]
 	mov	edx, dword ptr [rdi + rcx]
 	pop	rbp
 	ret
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0)
 	.p2align	4, 0x90
-SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0):
+SYM(<test_define_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>::drop, 0):
 	push	rbp
 	mov	rbp, rsp
 	## InlineAsm Start
@@ -584,10 +584,10 @@ SYM(<test_declare_class[CRATE_ID]::DropIvars as core[CRATE_ID]::ops::drop::Drop>
 	.globl	_access_drop_ivars_class
 	.p2align	4, 0x90
 _access_drop_ivars_class:
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB10_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
 	ret
 LBB10_1:
 	push	rbp
@@ -596,7 +596,7 @@ LBB10_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].1]
 	lea	r8, [rip + l_anon.[ID].25]
 	lea	rdx, [rbp - 16]
@@ -604,7 +604,7 @@ LBB10_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
 	ret
 
 	.globl	_access_drop_ivars
@@ -612,19 +612,19 @@ LBB10_1:
 _access_drop_ivars:
 	push	rbp
 	mov	rbp, rsp
-	mov	rcx, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
+	mov	rcx, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
 	mov	rax, qword ptr [rdi + rcx]
 	mov	rdx, qword ptr [rdi + rcx + 8]
 	pop	rbp
 	ret
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	4, 0x90
-SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB12_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	ret
 LBB12_1:
 	push	rbp
@@ -633,7 +633,7 @@ LBB12_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].0]
 	lea	r8, [rip + l_anon.[ID].15]
 	lea	rdx, [rbp - 16]
@@ -641,16 +641,16 @@ LBB12_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	ret
 
 	.globl	_get_class
 	.p2align	4, 0x90
 _get_class:
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB13_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	ret
 LBB13_1:
 	push	rbp
@@ -659,7 +659,7 @@ LBB13_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].0]
 	lea	r8, [rip + l_anon.[ID].15]
 	lea	rdx, [rbp - 16]
@@ -667,7 +667,7 @@ LBB13_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	ret
 
 	.globl	_method_simple
@@ -695,11 +695,11 @@ _method_retained:
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB16_1
 LBB16_2:
-	mov	rdi, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rdi, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	mov	rax, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_new@GOTPCREL]
 	mov	rsi, qword ptr [rax]
 	call	_objc_msgSend
@@ -712,7 +712,7 @@ LBB16_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].0]
 	lea	r8, [rip + l_anon.[ID].15]
 	lea	rdx, [rbp - 16]
@@ -805,11 +805,11 @@ _copyWithZone:
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB18_1
 LBB18_2:
-	mov	rdi, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
+	mov	rdi, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0]
 	mov	rax, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_new@GOTPCREL]
 	mov	rsi, qword ptr [rax]
 	call	_objc_msgSend
@@ -820,7 +820,7 @@ LBB18_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].0]
 	lea	r8, [rip + l_anon.[ID].15]
 	lea	rdx, [rbp - 16]
@@ -828,13 +828,13 @@ LBB18_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	jmp	LBB18_2
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	4, 0x90
-SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB19_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
 	ret
 LBB19_1:
 	push	rbp
@@ -843,7 +843,7 @@ LBB19_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].2]
 	lea	r8, [rip + l_anon.[ID].24]
 	lea	rdx, [rbp - 16]
@@ -851,7 +851,7 @@ LBB19_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0]
 	ret
 
 	.globl	_init_forgetable_ivars
@@ -859,14 +859,14 @@ LBB19_1:
 _init_forgetable_ivars:
 	test	rdi, rdi
 	je	LBB20_2
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)]
 	mov	dword ptr [rdi + rax], 43
 	mov	byte ptr [rdi + rax + 4], 42
 LBB20_2:
 	push	rbp
 	mov	rbp, rsp
 	sub	rsp, 16
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d]
 	mov	rax, qword ptr [rip + L_OBJC_CLASSLIST_REFERENCES_$_NSObject@GOTPCREL]
 	mov	rax, qword ptr [rax]
 	mov	qword ptr [rbp - 16], rdi
@@ -877,13 +877,13 @@ LBB20_2:
 	pop	rbp
 	ret
 
-	.globl	SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
+	.globl	SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0)
 	.p2align	4, 0x90
-SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
-	mov	rax, qword ptr [rip + SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class, 0):
+	mov	rax, qword ptr [rip + SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	cmp	rax, 3
 	jne	LBB21_1
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
 	ret
 LBB21_1:
 	push	rbp
@@ -892,7 +892,7 @@ LBB21_1:
 	mov	byte ptr [rbp - 1], 1
 	lea	rax, [rbp - 1]
 	mov	qword ptr [rbp - 16], rax
-	lea	rdi, [rip + SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
+	lea	rdi, [rip + SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0)]
 	lea	rcx, [rip + l_anon.[ID].1]
 	lea	r8, [rip + l_anon.[ID].25]
 	lea	rdx, [rbp - 16]
@@ -900,7 +900,7 @@ LBB21_1:
 	call	SYM(std::sys::sync::once::queue::Once::call::GENERATED_ID, 0)
 	add	rsp, 16
 	pop	rbp
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0]
 	ret
 
 	.globl	_init_drop_ivars
@@ -925,10 +925,10 @@ Ltmp50:
 	mov	r12, rax
 	test	rbx, rbx
 	je	LBB22_3
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)]
 	mov	qword ptr [rbx + rax], r15
 	mov	qword ptr [rbx + rax + 8], r12
-	mov	rax, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
+	mov	rax, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
 	mov	byte ptr [rbx + rax], 15
 	jmp	LBB22_9
 LBB22_3:
@@ -939,7 +939,7 @@ Ltmp58:
 	mov	rdi, r12
 	call	_objc_release
 LBB22_9:
-	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d]
+	mov	rsi, qword ptr [rip + L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f]
 	mov	rax, qword ptr [rip + L_OBJC_CLASSLIST_REFERENCES_$_NSObject@GOTPCREL]
 	mov	rax, qword ptr [rax]
 	mov	qword ptr [rbp - 48], rbx
@@ -948,7 +948,7 @@ LBB22_9:
 	call	_objc_msgSendSuper
 	test	rax, rax
 	je	LBB22_11
-	mov	rcx, qword ptr [rip + SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
+	mov	rcx, qword ptr [rip + SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)]
 	mov	byte ptr [rax + rcx], -1
 LBB22_11:
 	add	rsp, 16
@@ -1043,20 +1043,20 @@ Lttbase2:
 	.p2align	3, 0x0
 l_anon.[ID].0:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.p2align	3, 0x0
 l_anon.[ID].1:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.p2align	3, 0x0
 l_anon.[ID].2:
 	.asciz	"\000\000\000\000\000\000\000\000\b\000\000\000\000\000\000\000\b\000\000\000\000\000\000"
-	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
-	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
+	.quad	SYM(<<std[CRATE_ID]::sync::once::Once>::call_once<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0} as core[CRATE_ID]::ops::function::FnOnce<(&std[CRATE_ID]::sync::once::OnceState,)>>::call_once::{shim:vtable#0}, 0)
+	.quad	SYM(<std[CRATE_ID]::sync::once::Once>::call_once::<<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::{closure#0}>::{closure#0}, 0)
 
 	.section	__TEXT,__const
 	.p2align	3, 0x0
@@ -1104,11 +1104,11 @@ l_anon.[ID].12:
 l_anon.[ID].13:
 	.ascii	"NoIvars"
 
-.zerofill __DATA,__bss,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0,8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1),8,3
+.zerofill __DATA,__bss,SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 0).0,8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 2),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 1),8,3
 l_anon.[ID].14:
 	.ascii	"crates/$DIR/lib.rs"
 
@@ -1116,9 +1116,9 @@ l_anon.[ID].14:
 	.p2align	3, 0x0
 l_anon.[ID].15:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000\016\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000\016\000\000\000\001\000\000"
 
-.zerofill __DATA,__bss,SYM(<test_declare_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
+.zerofill __DATA,__bss,SYM(<test_define_class[CRATE_ID]::NoIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
 	.section	__TEXT,__const
 	.p2align	3, 0x0
 l_anon.[ID].16:
@@ -1164,163 +1164,163 @@ l_anon.[ID].23:
 	.space	24
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_4534bbe5e50290a1
-L_OBJC_METH_VAR_NAME_4534bbe5e50290a1:
+	.globl	L_OBJC_METH_VAR_NAME_4ee60abb2719f036
+L_OBJC_METH_VAR_NAME_4ee60abb2719f036:
 	.asciz	"classMethod"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1
+	.globl	L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_4534bbe5e50290a1:
-	.quad	L_OBJC_METH_VAR_NAME_4534bbe5e50290a1
+L_OBJC_SELECTOR_REFERENCES_4ee60abb2719f036:
+	.quad	L_OBJC_METH_VAR_NAME_4ee60abb2719f036
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_4534bbe5e50290a1
+	.globl	L_OBJC_IMAGE_INFO_4ee60abb2719f036
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_4534bbe5e50290a1:
+L_OBJC_IMAGE_INFO_4ee60abb2719f036:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_885f02de2bcfda61
-L_OBJC_METH_VAR_NAME_885f02de2bcfda61:
+	.globl	L_OBJC_METH_VAR_NAME_94f56691766f024b
+L_OBJC_METH_VAR_NAME_94f56691766f024b:
 	.asciz	"method"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61
+	.globl	L_OBJC_SELECTOR_REFERENCES_94f56691766f024b
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_885f02de2bcfda61:
-	.quad	L_OBJC_METH_VAR_NAME_885f02de2bcfda61
+L_OBJC_SELECTOR_REFERENCES_94f56691766f024b:
+	.quad	L_OBJC_METH_VAR_NAME_94f56691766f024b
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_885f02de2bcfda61
+	.globl	L_OBJC_IMAGE_INFO_94f56691766f024b
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_885f02de2bcfda61:
+L_OBJC_IMAGE_INFO_94f56691766f024b:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_22190004c3782bc8
-L_OBJC_METH_VAR_NAME_22190004c3782bc8:
+	.globl	L_OBJC_METH_VAR_NAME_d6661a0373fc878f
+L_OBJC_METH_VAR_NAME_d6661a0373fc878f:
 	.asciz	"methodBool:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8
+	.globl	L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_22190004c3782bc8:
-	.quad	L_OBJC_METH_VAR_NAME_22190004c3782bc8
+L_OBJC_SELECTOR_REFERENCES_d6661a0373fc878f:
+	.quad	L_OBJC_METH_VAR_NAME_d6661a0373fc878f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_22190004c3782bc8
+	.globl	L_OBJC_IMAGE_INFO_d6661a0373fc878f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_22190004c3782bc8:
+L_OBJC_IMAGE_INFO_d6661a0373fc878f:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_384873ae30ec6d43
-L_OBJC_METH_VAR_NAME_384873ae30ec6d43:
+	.globl	L_OBJC_METH_VAR_NAME_8677be6883ccd195
+L_OBJC_METH_VAR_NAME_8677be6883ccd195:
 	.asciz	"methodRetained"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43
+	.globl	L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_384873ae30ec6d43:
-	.quad	L_OBJC_METH_VAR_NAME_384873ae30ec6d43
+L_OBJC_SELECTOR_REFERENCES_8677be6883ccd195:
+	.quad	L_OBJC_METH_VAR_NAME_8677be6883ccd195
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_384873ae30ec6d43
+	.globl	L_OBJC_IMAGE_INFO_8677be6883ccd195
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_384873ae30ec6d43:
+L_OBJC_IMAGE_INFO_8677be6883ccd195:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3
-L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3:
+	.globl	L_OBJC_METH_VAR_NAME_3f5c953c5f98b853
+L_OBJC_METH_VAR_NAME_3f5c953c5f98b853:
 	.asciz	"methodRetainedWithParam:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3
+	.globl	L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_56240dc6bf8dcec3:
-	.quad	L_OBJC_METH_VAR_NAME_56240dc6bf8dcec3
+L_OBJC_SELECTOR_REFERENCES_3f5c953c5f98b853:
+	.quad	L_OBJC_METH_VAR_NAME_3f5c953c5f98b853
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_56240dc6bf8dcec3
+	.globl	L_OBJC_IMAGE_INFO_3f5c953c5f98b853
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_56240dc6bf8dcec3:
+L_OBJC_IMAGE_INFO_3f5c953c5f98b853:
 	.asciz	"\000\000\000\000@\000\000"
 
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_8e8381168048230b
-L_OBJC_METH_VAR_NAME_8e8381168048230b:
+	.globl	L_OBJC_METH_VAR_NAME_76a1da9e60049d4f
+L_OBJC_METH_VAR_NAME_76a1da9e60049d4f:
 	.asciz	"copyWithZone:"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_8e8381168048230b
+	.globl	L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_8e8381168048230b:
-	.quad	L_OBJC_METH_VAR_NAME_8e8381168048230b
+L_OBJC_SELECTOR_REFERENCES_76a1da9e60049d4f:
+	.quad	L_OBJC_METH_VAR_NAME_76a1da9e60049d4f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_8e8381168048230b
+	.globl	L_OBJC_IMAGE_INFO_76a1da9e60049d4f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_8e8381168048230b:
+L_OBJC_IMAGE_INFO_76a1da9e60049d4f:
 	.asciz	"\000\000\000\000@\000\000"
 
-.zerofill __DATA,__bss,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0,8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2),8,3
+.zerofill __DATA,__bss,SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 2).0,8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 1),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 2),8,3
 	.section	__DATA,__const
 	.p2align	3, 0x0
 l_anon.[ID].24:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000M\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000M\000\000\000\001\000\000"
 
-.zerofill __DATA,__bss,SYM(<test_declare_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
+.zerofill __DATA,__bss,SYM(<test_define_class[CRATE_ID]::ForgetableIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_affdf4249c01fc9d
-L_OBJC_METH_VAR_NAME_affdf4249c01fc9d:
+	.globl	L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d
+L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d:
 	.asciz	"init"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d
+	.globl	L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_affdf4249c01fc9d:
-	.quad	L_OBJC_METH_VAR_NAME_affdf4249c01fc9d
+L_OBJC_SELECTOR_REFERENCES_8ae30338ec8fe87d:
+	.quad	L_OBJC_METH_VAR_NAME_8ae30338ec8fe87d
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_affdf4249c01fc9d
+	.globl	L_OBJC_IMAGE_INFO_8ae30338ec8fe87d
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_affdf4249c01fc9d:
+L_OBJC_IMAGE_INFO_8ae30338ec8fe87d:
 	.asciz	"\000\000\000\000@\000\000"
 
-.zerofill __DATA,__bss,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0,8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0),8,3
-	.globl	SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)
-.zerofill __DATA,__common,SYM(test_declare_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0),8,3
+.zerofill __DATA,__bss,SYM(test_define_class[CRATE_ID]::_::__OBJC2_CLASS, 1).0,8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_IVAR_OFFSET, 0),8,3
+	.globl	SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0)
+.zerofill __DATA,__common,SYM(test_define_class[CRATE_ID]::_::__OBJC2_DROP_FLAG_OFFSET, 0),8,3
 	.section	__DATA,__const
 	.p2align	3, 0x0
 l_anon.[ID].25:
 	.quad	l_anon.[ID].14
-	.asciz	"5\000\000\000\000\000\000\000o\000\000\000\001\000\000"
+	.asciz	"4\000\000\000\000\000\000\000o\000\000\000\001\000\000"
 
-.zerofill __DATA,__bss,SYM(<test_declare_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
+.zerofill __DATA,__bss,SYM(<test_define_class[CRATE_ID]::DropIvars as objc2[CRATE_ID]::top_level_traits::ClassType>::class::REGISTER_CLASS, 0),8,3
 	.section	__TEXT,__objc_methname,cstring_literals
-	.globl	L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d
-L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d:
+	.globl	L_OBJC_METH_VAR_NAME_c3d3047551604c9f
+L_OBJC_METH_VAR_NAME_c3d3047551604c9f:
 	.asciz	"init"
 
 	.section	__DATA,__objc_selrefs,literal_pointers
-	.globl	L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d
+	.globl	L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f
 	.p2align	3, 0x0
-L_OBJC_SELECTOR_REFERENCES_8a88921dfbe0b09d:
-	.quad	L_OBJC_METH_VAR_NAME_8a88921dfbe0b09d
+L_OBJC_SELECTOR_REFERENCES_c3d3047551604c9f:
+	.quad	L_OBJC_METH_VAR_NAME_c3d3047551604c9f
 
 	.section	__DATA,__objc_imageinfo,regular,no_dead_strip
-	.globl	L_OBJC_IMAGE_INFO_8a88921dfbe0b09d
+	.globl	L_OBJC_IMAGE_INFO_c3d3047551604c9f
 	.p2align	2, 0x0
-L_OBJC_IMAGE_INFO_8a88921dfbe0b09d:
+L_OBJC_IMAGE_INFO_c3d3047551604c9f:
 	.asciz	"\000\000\000\000@\000\000"
 
 .subsections_via_symbols
diff --git a/crates/test-assembly/crates/test_declare_class/expected/gnustep-x86.s b/crates/test-assembly/crates/test_define_class/expected/gnustep-x86.s
similarity index 100%
rename from crates/test-assembly/crates/test_declare_class/expected/gnustep-x86.s
rename to crates/test-assembly/crates/test_define_class/expected/gnustep-x86.s
diff --git a/crates/test-assembly/crates/test_declare_class/expected/gnustep-x86_64.s b/crates/test-assembly/crates/test_define_class/expected/gnustep-x86_64.s
similarity index 100%
rename from crates/test-assembly/crates/test_declare_class/expected/gnustep-x86_64.s
rename to crates/test-assembly/crates/test_define_class/expected/gnustep-x86_64.s
diff --git a/crates/test-assembly/crates/test_declare_class/lib.rs b/crates/test-assembly/crates/test_define_class/lib.rs
similarity index 96%
rename from crates/test-assembly/crates/test_declare_class/lib.rs
rename to crates/test-assembly/crates/test_define_class/lib.rs
index cf32b0b26..5a12e1d9a 100644
--- a/crates/test-assembly/crates/test_declare_class/lib.rs
+++ b/crates/test-assembly/crates/test_define_class/lib.rs
@@ -1,4 +1,4 @@
-//! Test assembly output of `declare_class!`.
+//! Test assembly output of `define_class!`.
 #![deny(unsafe_op_in_unsafe_fn)]
 // Limit to Apple targets only, since we don't particularly care about GNUStep code-size for now.
 #![cfg(target_vendor = "apple")]
@@ -8,10 +8,10 @@ use core::ptr;
 
 use objc2::rc::{Allocated, Retained};
 use objc2::runtime::AnyClass;
-use objc2::{declare_class, msg_send_id, ClassType, DeclaredClass};
+use objc2::{define_class, msg_send_id, ClassType, DefinedClass};
 use objc2_foundation::{CopyingHelper, NSCopying, NSObject, NSObjectProtocol, NSZone};
 
-declare_class!(
+define_class!(
     #[no_mangle]
     #[unsafe(super(NSObject))]
     #[name = "NoIvars"]
@@ -74,7 +74,7 @@ pub struct ForgetableIvarsIvars {
     bar: u32,
 }
 
-declare_class!(
+define_class!(
     #[no_mangle]
     #[unsafe(super(NSObject))]
     #[name = "ForgetableIvars"]
@@ -108,7 +108,7 @@ pub struct DropIvarsIvars {
     obj_option: Option<Retained<NSObject>>,
 }
 
-declare_class!(
+define_class!(
     #[no_mangle]
     #[unsafe(super(NSObject))]
     #[name = "DropIvars"]
diff --git a/crates/test-fuzz/fuzz_targets/collection_interior_mut.rs b/crates/test-fuzz/fuzz_targets/collection_interior_mut.rs
index 23ce4a6c3..bdc242a6b 100644
--- a/crates/test-fuzz/fuzz_targets/collection_interior_mut.rs
+++ b/crates/test-fuzz/fuzz_targets/collection_interior_mut.rs
@@ -12,7 +12,7 @@ use std::hint::black_box;
 use arbitrary::Arbitrary;
 use objc2::rc::{autoreleasepool, Retained};
 use objc2::runtime::AnyObject;
-use objc2::{declare_class, msg_send_id, AllocAnyThread, ClassType, DeclaredClass, Message};
+use objc2::{define_class, msg_send_id, AllocAnyThread, ClassType, DefinedClass, Message};
 use objc2_foundation::{
     CopyingHelper, NSCopying, NSMutableDictionary, NSMutableSet, NSObject, NSObjectProtocol,
     NSUInteger, NSZone,
@@ -47,7 +47,7 @@ struct KeyIvars {
     equal_to_mask: Cell<u8>,
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "Key"]
     #[ivars = KeyIvars]
diff --git a/crates/test-ui/ui/add_method_no_bool.rs b/crates/test-ui/ui/add_method_no_bool.rs
index d4d75ba08..093c189bc 100644
--- a/crates/test-ui/ui/add_method_no_bool.rs
+++ b/crates/test-ui/ui/add_method_no_bool.rs
@@ -1,8 +1,7 @@
 //! Ensure that methods taking/returning `bool` are not allowed.
 //!
 //! This is not sound without a conversion step.
-use objc2::declare::ClassBuilder;
-use objc2::runtime::{NSObject, Sel};
+use objc2::runtime::{ClassBuilder, NSObject, Sel};
 use objc2::sel;
 
 extern "C" fn my_bool_taking_method(_obj: &NSObject, _sel: Sel, _arg: bool) {}
diff --git a/crates/test-ui/ui/add_method_no_bool.stderr b/crates/test-ui/ui/add_method_no_bool.stderr
index f17b7d84b..7a5ae533b 100644
--- a/crates/test-ui/ui/add_method_no_bool.stderr
+++ b/crates/test-ui/ui/add_method_no_bool.stderr
@@ -19,7 +19,7 @@ error[E0277]: the trait bound `bool: Encode` is not satisfied
   = note: required for `bool` to implement `EncodeArgument`
   = note: required for `unsafe extern "C" fn(&NSObject, objc2::runtime::Sel, bool)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
@@ -48,7 +48,7 @@ error[E0277]: the trait bound `bool: Encode` is not satisfied
   = note: required for `bool` to implement `EncodeReturn`
   = note: required for `unsafe extern "C" fn(&NSObject, objc2::runtime::Sel) -> bool` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
diff --git a/crates/test-ui/ui/declare_add_bad_method.rs b/crates/test-ui/ui/define_add_bad_method.rs
similarity index 85%
rename from crates/test-ui/ui/declare_add_bad_method.rs
rename to crates/test-ui/ui/define_add_bad_method.rs
index e9d7350c0..0241ead98 100644
--- a/crates/test-ui/ui/declare_add_bad_method.rs
+++ b/crates/test-ui/ui/define_add_bad_method.rs
@@ -1,10 +1,9 @@
-use objc2::declare::ClassBuilder;
 use objc2::rc::{Allocated, Retained};
-use objc2::runtime::{NSObject, Sel};
+use objc2::runtime::{ClassBuilder, NSObject, Sel};
 use objc2::{sel, ClassType};
 
 fn main() {
-    let builder = ClassBuilder::new(c"DeclareClassTest", NSObject::class()).unwrap();
+    let builder = ClassBuilder::new(c"DefineClassTest", NSObject::class()).unwrap();
 
     // Test receiver
     unsafe {
diff --git a/crates/test-ui/ui/declare_add_bad_method.stderr b/crates/test-ui/ui/define_add_bad_method.stderr
similarity index 94%
rename from crates/test-ui/ui/declare_add_bad_method.stderr
rename to crates/test-ui/ui/define_add_bad_method.stderr
index 7c1830b24..6df84ce1b 100644
--- a/crates/test-ui/ui/declare_add_bad_method.stderr
+++ b/crates/test-ui/ui/define_add_bad_method.stderr
@@ -1,5 +1,5 @@
 error[E0277]: the trait bound `fn(_, _): MethodImplementation` is not satisfied
- --> ui/declare_add_bad_method.rs
+ --> ui/define_add_bad_method.rs
   |
   |         builder.add_method(sel!(foo), foo as fn(_, _));
   |                 ----------            ^^^^^^^^^^^^^^^ the trait `MethodImplementation` is not implemented for `fn(_, _)`
@@ -17,7 +17,7 @@ error[E0277]: the trait bound `fn(_, _): MethodImplementation` is not satisfied
             extern "C" fn(Allocated<T>, objc2::runtime::Sel, A, B, C, D, E, F, G) -> RetainedReturnValue
           and $N others
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
@@ -26,7 +26,7 @@ note: required by a bound in `ClassBuilder::add_method`
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilder::add_method`
 
 error[E0277]: the trait bound `fn(_, _): MethodImplementation` is not satisfied
- --> ui/declare_add_bad_method.rs
+ --> ui/define_add_bad_method.rs
   |
   |         builder.add_method(sel!(foo), foo as fn(_, _));
   |                 ----------            ^^^^^^^^^^^^^^^ the trait `MethodImplementation` is not implemented for `fn(_, _)`
@@ -44,7 +44,7 @@ error[E0277]: the trait bound `fn(_, _): MethodImplementation` is not satisfied
             extern "C" fn(Allocated<T>, objc2::runtime::Sel, A, B, C, D, E, F, G) -> RetainedReturnValue
           and $N others
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
@@ -53,7 +53,7 @@ note: required by a bound in `ClassBuilder::add_method`
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilder::add_method`
 
 error[E0277]: the trait bound `fn(_, _) -> _: MethodImplementation` is not satisfied
- --> ui/declare_add_bad_method.rs
+ --> ui/define_add_bad_method.rs
   |
   |         builder.add_method(sel!(foo), foo as fn(_, _) -> _);
   |                 ----------            ^^^^^^^^^^^^^^^^^^^^ the trait `MethodImplementation` is not implemented for `fn(_, _) -> _`
@@ -71,7 +71,7 @@ error[E0277]: the trait bound `fn(_, _) -> _: MethodImplementation` is not satis
             extern "C" fn(Allocated<T>, objc2::runtime::Sel, A, B, C, D, E, F, G) -> RetainedReturnValue
           and $N others
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
@@ -80,7 +80,7 @@ note: required by a bound in `ClassBuilder::add_method`
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilder::add_method`
 
 error[E0277]: the trait bound `fn(_, _) -> _: MethodImplementation` is not satisfied
- --> ui/declare_add_bad_method.rs
+ --> ui/define_add_bad_method.rs
   |
   |         builder.add_method(sel!(foo), foo as fn(_, _) -> _);
   |                 ----------            ^^^^^^^^^^^^^^^^^^^^ the trait `MethodImplementation` is not implemented for `fn(_, _) -> _`
@@ -98,7 +98,7 @@ error[E0277]: the trait bound `fn(_, _) -> _: MethodImplementation` is not satis
             extern "C" fn(Allocated<T>, objc2::runtime::Sel, A, B, C, D, E, F, G) -> RetainedReturnValue
           and $N others
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
@@ -107,7 +107,7 @@ note: required by a bound in `ClassBuilder::add_method`
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilder::add_method`
 
 error[E0277]: the trait bound `fn(_, _, _): MethodImplementation` is not satisfied
- --> ui/declare_add_bad_method.rs
+ --> ui/define_add_bad_method.rs
   |
   |         builder.add_method(sel!(foo:), foo as fn(_, _, _));
   |                 ----------             ^^^^^^^^^^^^^^^^^^ the trait `MethodImplementation` is not implemented for `fn(_, _, _)`
@@ -125,7 +125,7 @@ error[E0277]: the trait bound `fn(_, _, _): MethodImplementation` is not satisfi
             extern "C" fn(Allocated<T>, objc2::runtime::Sel, A, B, C, D, E, F, G) -> RetainedReturnValue
           and $N others
 note: required by a bound in `ClassBuilder::add_method`
- --> $WORKSPACE/crates/objc2/src/runtime/declare.rs
+ --> $WORKSPACE/crates/objc2/src/runtime/define.rs
   |
   |     pub unsafe fn add_method<T, F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
diff --git a/crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.rs b/crates/test-ui/ui/define_class_delegate_not_mainthreadonly.rs
similarity index 92%
rename from crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.rs
rename to crates/test-ui/ui/define_class_delegate_not_mainthreadonly.rs
index 6332d80e1..0a8e3d18d 100644
--- a/crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.rs
+++ b/crates/test-ui/ui/define_class_delegate_not_mainthreadonly.rs
@@ -2,7 +2,7 @@
 //! a `MainThreadOnly` class.
 use objc2::rc::Retained;
 use objc2::{
-    declare_class, extern_methods, extern_protocol, AllocAnyThread, MainThreadOnly, ProtocolType,
+    define_class, extern_methods, extern_protocol, AllocAnyThread, MainThreadOnly, ProtocolType,
 };
 use objc2_foundation::{MainThreadMarker, NSNotification, NSObject, NSObjectProtocol};
 
@@ -19,7 +19,7 @@ extern_protocol!(
     unsafe impl ProtocolType for dyn NSApplicationDelegate {}
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[thread_kind = AllocAnyThread] // Not `MainThreadOnly`
     #[name = "CustomObject"]
diff --git a/crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.stderr b/crates/test-ui/ui/define_class_delegate_not_mainthreadonly.stderr
similarity index 92%
rename from crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.stderr
rename to crates/test-ui/ui/define_class_delegate_not_mainthreadonly.stderr
index c413bdfd3..271513914 100644
--- a/crates/test-ui/ui/declare_class_delegate_not_mainthreadonly.stderr
+++ b/crates/test-ui/ui/define_class_delegate_not_mainthreadonly.stderr
@@ -1,5 +1,5 @@
 error[E0271]: type mismatch resolving `<CustomObject as ClassType>::ThreadKind == dyn MainThreadOnly`
- --> ui/declare_class_delegate_not_mainthreadonly.rs
+ --> ui/define_class_delegate_not_mainthreadonly.rs
   |
   |     unsafe impl NSApplicationDelegate for CustomObject {
   |                                           ^^^^^^^^^^^^ expected trait `MainThreadOnly`, found trait `AllocAnyThread`
@@ -9,7 +9,7 @@ error[E0271]: type mismatch resolving `<CustomObject as ClassType>::ThreadKind =
   = help: `(dyn AllocAnyThread + 'static)` implements `MainThreadOnly` so you could box the found value and coerce it to the trait object `Box<dyn MainThreadOnly>`, you will have to change the expected type as well
   = note: required for `CustomObject` to implement `MainThreadOnly`
 note: required by a bound in `NSApplicationDelegate`
- --> ui/declare_class_delegate_not_mainthreadonly.rs
+ --> ui/define_class_delegate_not_mainthreadonly.rs
   |
   | / extern_protocol!(
   | |     pub unsafe trait NSApplicationDelegate: NSObjectProtocol + MainThreadOnly {
diff --git a/crates/test-ui/ui/declare_class_invalid_receiver.rs b/crates/test-ui/ui/define_class_invalid_receiver.rs
similarity index 97%
rename from crates/test-ui/ui/declare_class_invalid_receiver.rs
rename to crates/test-ui/ui/define_class_invalid_receiver.rs
index 81736c654..06c95a6af 100644
--- a/crates/test-ui/ui/declare_class_invalid_receiver.rs
+++ b/crates/test-ui/ui/define_class_invalid_receiver.rs
@@ -1,9 +1,9 @@
 #![allow(unused_variables)]
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::{Allocated, Retained};
 use objc2::runtime::{AnyClass, NSObject};
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject"]
     struct CustomObject;
diff --git a/crates/test-ui/ui/declare_class_invalid_receiver.stderr b/crates/test-ui/ui/define_class_invalid_receiver.stderr
similarity index 73%
rename from crates/test-ui/ui/declare_class_invalid_receiver.stderr
rename to crates/test-ui/ui/define_class_invalid_receiver.stderr
index 91b7079f8..6e7129535 100644
--- a/crates/test-ui/ui/declare_class_invalid_receiver.stderr
+++ b/crates/test-ui/ui/define_class_invalid_receiver.stderr
@@ -1,7 +1,7 @@
 error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -21,19 +21,19 @@ error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisf
             NonNull<T>
   = note: required for `extern "C-unwind" fn(Box<CustomObject>, objc2::runtime::Sel)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -53,19 +53,19 @@ error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not s
             NonNull<T>
   = note: required for `extern "C-unwind" fn(Retained<CustomObject>, objc2::runtime::Sel)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -85,19 +85,19 @@ error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
             NonNull<T>
   = note: required for `extern "C-unwind" fn(CustomObject, objc2::runtime::Sel)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0271]: type mismatch resolving `<extern "C-unwind" fn(&AnyClass, Sel) as MethodImplementation>::Callee == CustomObject`
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -110,19 +110,19 @@ error[E0271]: type mismatch resolving `<extern "C-unwind" fn(&AnyClass, Sel) as
   |   required by a bound introduced by this call
   |
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |                                 ^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0271]: type mismatch resolving `<extern "C-unwind" fn(&NSObject, Sel) as MethodImplementation>::Callee == CustomObject`
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -135,19 +135,19 @@ error[E0271]: type mismatch resolving `<extern "C-unwind" fn(&NSObject, Sel) as
   |   required by a bound introduced by this call
   |
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |                                 ^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -167,19 +167,19 @@ error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisf
             NonNull<T>
   = note: required for `extern "C-unwind" fn(Box<CustomObject>, objc2::runtime::Sel) -> RetainedReturnValue` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -199,19 +199,19 @@ error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not s
             NonNull<T>
   = note: required for `extern "C-unwind" fn(Retained<CustomObject>, objc2::runtime::Sel) -> RetainedReturnValue` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -231,19 +231,19 @@ error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
             NonNull<T>
   = note: required for `extern "C-unwind" fn(CustomObject, objc2::runtime::Sel) -> RetainedReturnValue` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -259,12 +259,12 @@ error[E0277]: the trait bound `Box<CustomObject>: MessageReceiver` is not satisf
             *mut T
             NonNull<T>
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<Box<CustomObject>, Retained<CustomObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -280,12 +280,12 @@ error[E0277]: the trait bound `Retained<CustomObject>: MessageReceiver` is not s
             *mut T
             NonNull<T>
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<Retained<CustomObject>, Retained<CustomObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -301,12 +301,12 @@ error[E0277]: the trait bound `CustomObject: MessageReceiver` is not satisfied
             *mut T
             NonNull<T>
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<CustomObject, Retained<CustomObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Allocated<CustomObject>: MessageReceiver` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -322,12 +322,12 @@ error[E0277]: the trait bound `Allocated<CustomObject>: MessageReceiver` is not
             *mut T
             NonNull<T>
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<Allocated<CustomObject>, Retained<CustomObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `RetainSemantics<3>: MessageReceiveRetained<&CustomObject, Retained<CustomObject>>` is not satisfied
- --> ui/declare_class_invalid_receiver.rs
+ --> ui/define_class_invalid_receiver.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -339,4 +339,4 @@ error[E0277]: the trait bound `RetainSemantics<3>: MessageReceiveRetained<&Custo
   = help: the trait `MessageReceiveRetained<&CustomObject, Retained<CustomObject>>` is not implemented for `RetainSemantics<3>`
           but trait `MessageReceiveRetained<Allocated<CustomObject>, Retained<CustomObject>>` is implemented for it
   = help: for that trait implementation, expected `Allocated<CustomObject>`, found `&CustomObject`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/test-ui/ui/declare_class_invalid_syntax.rs b/crates/test-ui/ui/define_class_invalid_syntax.rs
similarity index 96%
rename from crates/test-ui/ui/declare_class_invalid_syntax.rs
rename to crates/test-ui/ui/define_class_invalid_syntax.rs
index e9a038d63..7423546a1 100644
--- a/crates/test-ui/ui/declare_class_invalid_syntax.rs
+++ b/crates/test-ui/ui/define_class_invalid_syntax.rs
@@ -1,8 +1,8 @@
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::Retained;
 use objc2::runtime::NSObject;
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "InvalidMethodDeclarations"]
     struct InvalidMethodDeclarations;
@@ -126,27 +126,27 @@ declare_class!(
     }
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     struct MissingName;
 );
 
-declare_class!(
+define_class!(
     #[name = "MissingSuper"]
     struct MissingSuper;
 );
 
-declare_class!(
+define_class!(
     #[super(NSObject)]
     #[name = "SafeSuper"]
     struct SafeSuper;
 );
 
-declare_class!(
+define_class!(
     struct MissingBoth;
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "HasRepr"]
     #[repr(transparent)]
diff --git a/crates/test-ui/ui/declare_class_invalid_syntax.stderr b/crates/test-ui/ui/define_class_invalid_syntax.stderr
similarity index 67%
rename from crates/test-ui/ui/declare_class_invalid_syntax.stderr
rename to crates/test-ui/ui/define_class_invalid_syntax.stderr
index 5d123eb19..3a94d8903 100644
--- a/crates/test-ui/ui/declare_class_invalid_syntax.stderr
+++ b/crates/test-ui/ui/define_class_invalid_syntax.stderr
@@ -1,7 +1,7 @@
 error: must specify the desired selector using `#[method(...)]` or `#[method_id(...)]`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -10,12 +10,12 @@ error: must specify the desired selector using `#[method(...)]` or `#[method_id(
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot specify the `method`/`method_id` attribute twice
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -24,12 +24,12 @@ error: cannot specify the `method`/`method_id` attribute twice
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot specify the `method`/`method_id` attribute twice
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -38,16 +38,16 @@ error: cannot specify the `method`/`method_id` attribute twice
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: expected expression, found `}`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         }
   |         ^ expected expression
 
 error: no rules expected `(`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_pattern((a, b): (u32, i32)) {
   |                         ^ no rules expected this token in macro call
@@ -55,21 +55,21 @@ error: no rules expected `(`
   = note: while trying to match sequence start
 
 error: unexpected end of macro invocation
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_self(self) {
   |                          ^ missing tokens in macro arguments
   |
 note: while trying to match `:`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         $param:ident : $param_ty:ty $(, $($rest:tt)*)?
   |                      ^
 
 error: no rules expected `(`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -79,12 +79,12 @@ error: no rules expected `(`
   | |_^ no rules expected this token in macro call
   |
   = note: while trying to match end of macro
-  = note: this error originates in the macro `$crate::__declare_class_register_methods` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_methods` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: no rules expected `(`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -94,16 +94,16 @@ error: no rules expected `(`
   | |_^ no rules expected this token in macro call
   |
   = note: while trying to match end of macro
-  = note: this error originates in the macro `$crate::__declare_class_register_methods` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_methods` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: expected identifier, found keyword `fn`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn fn test_fn_fn() {}
   |            ^^ expected identifier, found keyword
 
 error: missing parameters for function definition
-  --> ui/declare_class_invalid_syntax.rs
+  --> ui/define_class_invalid_syntax.rs
    |
    |         fn fn test_fn_fn() {}
    |              ^
@@ -114,31 +114,31 @@ help: add a parameter list
    |              ++
 
 error: expected one of `->`, `<`, `where`, or `{`, found `test_fn_fn`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn fn test_fn_fn() {}
   |               ^^^^^^^^^^ expected one of `->`, `<`, `where`, or `{`
   |
- ::: $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ ::: $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         $_associated_item:item
   |         ---------------------- while parsing argument for this `item` macro fragment
 
 error: expected one of `->`, `where`, or `{`, found `<eof>`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_unfinished()
   |                            ^ expected one of `->`, `where`, or `{`
   |
- ::: $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ ::: $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         $_associated_item:item
   |         ---------------------- while parsing argument for this `item` macro fragment
 
 error: `#[method_id(alloc)]` is not supported. Use `#[method(alloc)]` and do the memory management yourself
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -147,12 +147,12 @@ error: `#[method_id(alloc)]` is not supported. Use `#[method(alloc)]` and do the
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method_id(retain)]` is not supported. Use `#[method(retain)]` and do the memory management yourself
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -161,12 +161,12 @@ error: `#[method_id(retain)]` is not supported. Use `#[method(retain)]` and do t
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method_id(release)]` is not supported. Use `#[method(release)]` and do the memory management yourself
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -175,12 +175,12 @@ error: `#[method_id(release)]` is not supported. Use `#[method(release)]` and do
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method_id(autorelease)]` is not supported. Use `#[method(autorelease)]` and do the memory management yourself
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -189,12 +189,12 @@ error: `#[method_id(autorelease)]` is not supported. Use `#[method(autorelease)]
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method_id(dealloc)]` is not supported. Implement `Drop` for the type instead
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -203,12 +203,12 @@ error: `#[method_id(dealloc)]` is not supported. Implement `Drop` for the type i
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method(dealloc)]` is not supported. Implement `Drop` for the type instead
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -217,10 +217,10 @@ error: `#[method(dealloc)]` is not supported. Implement `Drop` for the type inst
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_invalid_selectors` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_invalid_selectors` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: an inner attribute is not permitted in this context
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         #![doc = "inner_attribute"]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -229,20 +229,20 @@ error: an inner attribute is not permitted in this context
   = note: outer attributes, like `#[test]`, annotate the item following them
 
 error: expected an item keyword
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         #![doc = "inner_attribute"]
   |                                   ^
   |
- ::: $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ ::: $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         $_associated_item:item
   |         ---------------------- while parsing argument for this `item` macro fragment
 
 error: must specify the desired selector using `#[method(...)]` or `#[method_id(...)]`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -251,12 +251,12 @@ error: must specify the desired selector using `#[method(...)]` or `#[method_id(
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot specify the `method`/`method_id` attribute twice
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -265,12 +265,12 @@ error: cannot specify the `method`/`method_id` attribute twice
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: cannot specify the `method`/`method_id` attribute twice
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -279,12 +279,12 @@ error: cannot specify the `method`/`method_id` attribute twice
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extract_custom_attributes_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[method_id(...)]` must have a return type
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -293,24 +293,24 @@ error: `#[method_id(...)]` must have a return type
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: no rules expected `(`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_pattern((a, b): (u32, i32)) {
   |                         ^ no rules expected this token in macro call
   |
 note: while trying to match reserved identifier `_`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         (_ : $param_ty:ty $(, $($params_rest:tt)*)?)
   |          ^
 
 error: no rules expected `)`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -320,122 +320,122 @@ error: no rules expected `)`
   | |_^ no rules expected this token in macro call
   |
 note: while trying to match `:`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         ($param:ident : $param_ty:ty $(, $($params_rest:tt)*)?)
   |                       ^
-  = note: this error originates in the macro `$crate::__declare_class_method_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: no rules expected keyword `pub`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         pub fn test_pub() {}
   |         ^^^ no rules expected this token in macro call
   |
 note: while trying to match keyword `unsafe`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         unsafe fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |         ^^^^^^
 
 error: no rules expected keyword `const`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         const fn test_const() {}
   |         ^^^^^ no rules expected this token in macro call
   |
 note: while trying to match keyword `unsafe`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         unsafe fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |         ^^^^^^
 
 error: no rules expected keyword `async`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         async fn test_async() {}
   |         ^^^^^ no rules expected this token in macro call
   |
 note: while trying to match keyword `unsafe`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         unsafe fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |         ^^^^^^
 
 error: no rules expected keyword `extern`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         extern "C" fn test_extern() {}
   |         ^^^^^^ no rules expected this token in macro call
   |
 note: while trying to match keyword `unsafe`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         unsafe fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |         ^^^^^^
 
 error: no rules expected `test_fn_fn`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn fn test_fn_fn() {}
   |               ^^^^^^^^^^ no rules expected this token in macro call
   |
 note: while trying to match `(`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |                       ^
 
 error: no rules expected `<`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_generic<T>() {}
   |                        ^ no rules expected this token in macro call
   |
 note: while trying to match `(`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |                       ^
 
 error: no rules expected `;`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_no_body(&self);
   |                               ^ no rules expected this token in macro call
   |
 note: while trying to match meta-variable `$body:block`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |                                                       ^^^^^^^^^^^
 
 error: unexpected end of macro invocation
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         fn test_unfinished()
   |                             ^ missing tokens in macro arguments
   |
 note: while trying to match meta-variable `$body:block`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         fn $name:ident($($params:tt)*) $(-> $ret:ty)? $body:block
   |                                                       ^^^^^^^^^^^
 
 error: no rules expected `!`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         #![doc = "inner_attribute"]
   |          ^ no rules expected this token in macro call
   |
 note: while trying to match `[`
- --> $WORKSPACE/crates/objc2/src/macros/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/macros/define_class.rs
   |
   |         $(#[$($m:tt)*])*
   |            ^
 
 error: no rules expected keyword `type`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         type TypeAlias = Self;
   |         ^^^^ no rules expected this token in macro call
@@ -443,7 +443,7 @@ error: no rules expected keyword `type`
   = note: while trying to match end of macro
 
 error: no rules expected keyword `const`
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
   |         const CONSTANT: () = ();
   |         ^^^^^ no rules expected this token in macro call
@@ -451,63 +451,63 @@ error: no rules expected keyword `const`
   = note: while trying to match end of macro
 
 error: must set name of class with #[name = ...]
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     struct MissingName;
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: must specify the superclass with #[unsafe(super(...))]
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[name = "MissingSuper"]
   | |     struct MissingSuper;
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: #[super(...)] must be wrapped in `unsafe`, as in #[unsafe(super(...))]
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[super(NSObject)]
   | |     #[name = "SafeSuper"]
   | |     struct SafeSuper;
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: must set name of class with #[name = ...]
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     struct MissingBoth;
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: must specify the superclass with #[unsafe(super(...))]
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     struct MissingBoth;
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extern_class_check_super_unsafe` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0692]: transparent struct cannot have other repr hints
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "HasRepr"]
   | |     #[repr(transparent)]
@@ -516,12 +516,12 @@ error[E0692]: transparent struct cannot have other repr hints
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__declare_class_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0599]: no function or associated item named `test_pattern` found for struct `InvalidMethodDeclarations` in the current scope
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -534,9 +534,9 @@ error[E0599]: no function or associated item named `test_pattern` found for stru
   | |_- function or associated item `test_pattern` not found for this struct
 
 error[E0599]: no function or associated item named `test_self` found for struct `InvalidMethodDeclarations` in the current scope
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -549,9 +549,9 @@ error[E0599]: no function or associated item named `test_self` found for struct
   | |_- function or associated item `test_self` not found for this struct
 
 error[E0277]: the trait bound `RetainSemantics<2>: MessageReceiveRetained<&AnyClass, Retained<InvalidMethodDeclarations>>` is not satisfied
- --> ui/declare_class_invalid_syntax.rs
+ --> ui/define_class_invalid_syntax.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "InvalidMethodDeclarations"]
   | |     struct InvalidMethodDeclarations;
@@ -566,4 +566,4 @@ error[E0277]: the trait bound `RetainSemantics<2>: MessageReceiveRetained<&AnyCl
             `RetainSemantics<4>` implements `MessageReceiveRetained<Receiver, Ret>`
             `RetainSemantics<5>` implements `MessageReceiveRetained<Receiver, Ret>`
             `RetainSemantics<6>` implements `MessageReceiveRetained<Receiver, Ret>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/test-ui/ui/declare_class_invalid_type.rs b/crates/test-ui/ui/define_class_invalid_type.rs
similarity index 93%
rename from crates/test-ui/ui/declare_class_invalid_type.rs
rename to crates/test-ui/ui/define_class_invalid_type.rs
index e386c16ce..bdb0c6a6a 100644
--- a/crates/test-ui/ui/declare_class_invalid_type.rs
+++ b/crates/test-ui/ui/define_class_invalid_type.rs
@@ -1,8 +1,8 @@
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::Retained;
 use objc2::runtime::NSObject;
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject"]
     struct CustomObject;
diff --git a/crates/test-ui/ui/declare_class_invalid_type.stderr b/crates/test-ui/ui/define_class_invalid_type.stderr
similarity index 78%
rename from crates/test-ui/ui/declare_class_invalid_type.stderr
rename to crates/test-ui/ui/define_class_invalid_type.stderr
index 5510cdb05..b2e0eb304 100644
--- a/crates/test-ui/ui/declare_class_invalid_type.stderr
+++ b/crates/test-ui/ui/define_class_invalid_type.stderr
@@ -1,7 +1,7 @@
 error[E0277]: the trait bound `Retained<CustomObject>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -31,12 +31,12 @@ note: required by a bound in `ConvertReturn`
   = help: the following types implement the trait:
             bool
             T
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Vec<()>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -66,12 +66,12 @@ note: required by a bound in `ConvertReturn`
   = help: the following types implement the trait:
             bool
             T
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<u32>: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -105,12 +105,12 @@ note: required by a bound in `ConvertArgument`
             std::option::Option<&mut std::option::Option<objc2::rc::Retained<T>>>
             bool
             T
-  = note: this error originates in the macro `$crate::__declare_class_rewrite_params` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_rewrite_params` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -144,12 +144,12 @@ note: required by a bound in `ConvertArgument`
             std::option::Option<&mut std::option::Option<objc2::rc::Retained<T>>>
             bool
             T
-  = note: this error originates in the macro `$crate::__declare_class_rewrite_params` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_rewrite_params` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -170,12 +170,12 @@ error[E0277]: the trait bound `Retained<CustomObject>: EncodeReturn` is not sati
           and $N others
   = note: required for `Retained<CustomObject>` to implement `EncodeReturn`
   = note: required for `Retained<CustomObject>` to implement `ConvertReturn`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: Encode` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -200,19 +200,19 @@ error[E0277]: the trait bound `Retained<CustomObject>: Encode` is not satisfied
   = note: required for `Retained<CustomObject>` to implement `EncodeReturn`
   = note: required for `extern "C-unwind" fn(&AnyClass, objc2::runtime::Sel) -> Retained<CustomObject>` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_class_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_class_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = AnyClass>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_class_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Vec<()>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -233,12 +233,12 @@ error[E0277]: the trait bound `Vec<()>: EncodeReturn` is not satisfied
           and $N others
   = note: required for `Vec<()>` to implement `EncodeReturn`
   = note: required for `Vec<()>` to implement `ConvertReturn`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Vec<()>: Encode` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -263,19 +263,19 @@ error[E0277]: the trait bound `Vec<()>: Encode` is not satisfied
   = note: required for `Vec<()>` to implement `EncodeReturn`
   = note: required for `extern "C-unwind" fn(&AnyClass, objc2::runtime::Sel) -> Vec<()>` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_class_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_class_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = AnyClass>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_class_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<u32>: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -296,12 +296,12 @@ error[E0277]: the trait bound `Box<u32>: EncodeArgument` is not satisfied
           and $N others
   = note: required for `Box<u32>` to implement `EncodeArgument`
   = note: required for `Box<u32>` to implement `ConvertArgument`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<u32>: Encode` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -326,19 +326,19 @@ error[E0277]: the trait bound `Box<u32>: Encode` is not satisfied
   = note: required for `Box<u32>` to implement `EncodeArgument`
   = note: required for `extern "C-unwind" fn(&CustomObject, objc2::runtime::Sel, Box<u32>)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -359,12 +359,12 @@ error[E0277]: the trait bound `CustomObject: EncodeArgument` is not satisfied
           and $N others
   = note: required for `CustomObject` to implement `EncodeArgument`
   = note: required for `CustomObject` to implement `ConvertArgument`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: Encode` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -389,19 +389,19 @@ error[E0277]: the trait bound `CustomObject: Encode` is not satisfied
   = note: required for `CustomObject` to implement `EncodeArgument`
   = note: required for `extern "C-unwind" fn(&CustomObject, objc2::runtime::Sel, CustomObject)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Retained<CustomObject>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -422,12 +422,12 @@ error[E0277]: the trait bound `Retained<CustomObject>: EncodeReturn` is not sati
           and $N others
   = note: required for `Retained<CustomObject>` to implement `EncodeReturn`
   = note: required for `Retained<CustomObject>` to implement `ConvertReturn`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Vec<()>: EncodeReturn` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -448,12 +448,12 @@ error[E0277]: the trait bound `Vec<()>: EncodeReturn` is not satisfied
           and $N others
   = note: required for `Vec<()>` to implement `EncodeReturn`
   = note: required for `Vec<()>` to implement `ConvertReturn`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `Box<u32>: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -474,12 +474,12 @@ error[E0277]: the trait bound `Box<u32>: EncodeArgument` is not satisfied
           and $N others
   = note: required for `Box<u32>` to implement `EncodeArgument`
   = note: required for `Box<u32>` to implement `ConvertArgument`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `CustomObject: EncodeArgument` is not satisfied
- --> ui/declare_class_invalid_type.rs
+ --> ui/define_class_invalid_type.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -500,4 +500,4 @@ error[E0277]: the trait bound `CustomObject: EncodeArgument` is not satisfied
           and $N others
   = note: required for `CustomObject` to implement `EncodeArgument`
   = note: required for `CustomObject` to implement `ConvertArgument`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/test-ui/ui/declare_class_invalid_type2.rs b/crates/test-ui/ui/define_class_invalid_type2.rs
similarity index 92%
rename from crates/test-ui/ui/declare_class_invalid_type2.rs
rename to crates/test-ui/ui/define_class_invalid_type2.rs
index ef12c1f7b..771a379f5 100644
--- a/crates/test-ui/ui/declare_class_invalid_type2.rs
+++ b/crates/test-ui/ui/define_class_invalid_type2.rs
@@ -1,8 +1,8 @@
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::{Allocated, Retained};
 use objc2::runtime::NSObject;
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject"]
     struct CustomObject;
diff --git a/crates/test-ui/ui/declare_class_invalid_type2.stderr b/crates/test-ui/ui/define_class_invalid_type2.stderr
similarity index 66%
rename from crates/test-ui/ui/declare_class_invalid_type2.stderr
rename to crates/test-ui/ui/define_class_invalid_type2.stderr
index c6a41e48e..63d488581 100644
--- a/crates/test-ui/ui/declare_class_invalid_type2.stderr
+++ b/crates/test-ui/ui/define_class_invalid_type2.stderr
@@ -1,7 +1,7 @@
 error[E0271]: type mismatch resolving `<Retained<NSObject> as MaybeUnwrap>::Input == Option<Retained<CustomObject>>`
- --> ui/declare_class_invalid_type2.rs
+ --> ui/define_class_invalid_type2.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -13,12 +13,12 @@ error[E0271]: type mismatch resolving `<Retained<NSObject> as MaybeUnwrap>::Inpu
   = note: expected enum `Option<Retained<CustomObject>>`
              found enum `Option<Retained<NSObject>>`
   = note: required for `RetainSemantics<3>` to implement `MessageReceiveRetained<Allocated<CustomObject>, Retained<NSObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `i32: MaybeOptionRetained` is not satisfied
- --> ui/declare_class_invalid_type2.rs
+ --> ui/define_class_invalid_type2.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -31,4 +31,4 @@ error[E0277]: the trait bound `i32: MaybeOptionRetained` is not satisfied
             Option<Retained<T>>
             Retained<T>
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<&CustomObject, i32>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/test-ui/ui/declare_class_mut_self_not_mutable.rs b/crates/test-ui/ui/define_class_mut_self_not_mutable.rs
similarity index 92%
rename from crates/test-ui/ui/declare_class_mut_self_not_mutable.rs
rename to crates/test-ui/ui/define_class_mut_self_not_mutable.rs
index dbd04b5f5..c1a00c973 100644
--- a/crates/test-ui/ui/declare_class_mut_self_not_mutable.rs
+++ b/crates/test-ui/ui/define_class_mut_self_not_mutable.rs
@@ -1,8 +1,8 @@
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::Retained;
 use objc2::runtime::NSObject;
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject"]
     struct CustomObject;
diff --git a/crates/test-ui/ui/declare_class_mut_self_not_mutable.stderr b/crates/test-ui/ui/define_class_mut_self_not_mutable.stderr
similarity index 76%
rename from crates/test-ui/ui/declare_class_mut_self_not_mutable.stderr
rename to crates/test-ui/ui/define_class_mut_self_not_mutable.stderr
index e1a282040..6b13145bd 100644
--- a/crates/test-ui/ui/declare_class_mut_self_not_mutable.stderr
+++ b/crates/test-ui/ui/define_class_mut_self_not_mutable.stderr
@@ -1,7 +1,7 @@
 error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_mut_self_not_mutable.rs
+ --> ui/define_class_mut_self_not_mutable.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -22,19 +22,19 @@ error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisf
   = note: `MessageReceiver` is implemented for `&CustomObject`, but not for `&mut CustomObject`
   = note: required for `extern "C-unwind" fn(&mut CustomObject, objc2::runtime::Sel) -> &mut CustomObject` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_mut_self_not_mutable.rs
+ --> ui/define_class_mut_self_not_mutable.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -55,19 +55,19 @@ error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisf
   = note: `MessageReceiver` is implemented for `&CustomObject`, but not for `&mut CustomObject`
   = note: required for `extern "C-unwind" fn(&mut CustomObject, objc2::runtime::Sel)` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_mut_self_not_mutable.rs
+ --> ui/define_class_mut_self_not_mutable.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -88,19 +88,19 @@ error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisf
   = note: `MessageReceiver` is implemented for `&CustomObject`, but not for `&mut CustomObject`
   = note: required for `extern "C-unwind" fn(&mut CustomObject, objc2::runtime::Sel) -> RetainedReturnValue` to implement `MethodImplementation`
 note: required by a bound in `ClassBuilderHelper::<T>::add_method`
- --> $WORKSPACE/crates/objc2/src/__macro_helpers/declare_class.rs
+ --> $WORKSPACE/crates/objc2/src/__macro_helpers/define_class.rs
   |
   |     pub unsafe fn add_method<F>(&mut self, sel: Sel, func: F)
   |                   ---------- required by a bound in this associated function
   |     where
   |         F: MethodImplementation<Callee = T>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `ClassBuilderHelper::<T>::add_method`
-  = note: this error originates in the macro `$crate::__declare_class_register_out` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_register_out` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisfied
- --> ui/declare_class_mut_self_not_mutable.rs
+ --> ui/define_class_mut_self_not_mutable.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject"]
   | |     struct CustomObject;
@@ -117,4 +117,4 @@ error[E0277]: the trait bound `&mut CustomObject: MessageReceiver` is not satisf
             NonNull<T>
   = note: `MessageReceiver` is implemented for `&CustomObject`, but not for `&mut CustomObject`
   = note: required for `RetainSemantics<6>` to implement `MessageReceiveRetained<&mut CustomObject, Retained<CustomObject>>`
-  = note: this error originates in the macro `$crate::__declare_class_method_out_inner` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__define_class_method_out_inner` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/test-ui/ui/fn_ptr_reference_method.rs b/crates/test-ui/ui/fn_ptr_reference_method.rs
index 793f87935..b3df76ee4 100644
--- a/crates/test-ui/ui/fn_ptr_reference_method.rs
+++ b/crates/test-ui/ui/fn_ptr_reference_method.rs
@@ -5,8 +5,7 @@
 //!
 //! (`_` can be used to work around this, by letting the compiler choose an
 //! appropriate lifetime '0 that the trait is implemented for).
-use objc2::declare::ClassBuilder;
-use objc2::runtime::{NSObject, Sel};
+use objc2::runtime::{ClassBuilder, NSObject, Sel};
 use objc2::{class, sel};
 
 extern "C" fn my_fn(_this: &NSObject, _cmd: Sel, _x: &NSObject) {}
diff --git a/crates/test-ui/ui/implement_protocol_missing_super.rs b/crates/test-ui/ui/implement_protocol_missing_super.rs
index bae31da39..cc3336894 100644
--- a/crates/test-ui/ui/implement_protocol_missing_super.rs
+++ b/crates/test-ui/ui/implement_protocol_missing_super.rs
@@ -1,9 +1,9 @@
 //! Test that implementing certain traits like `NSURLSessionDelegate` requires
 //! super protocols like `NSObjectProtocol` to also be implemented.
-use objc2::{declare_class, MainThreadOnly};
+use objc2::{define_class, MainThreadOnly};
 use objc2_foundation::{NSObject, NSURLSessionDelegate};
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[thread_kind = MainThreadOnly]
     #[name = "CustomObject"]
diff --git a/crates/test-ui/ui/main_thread_only_not_allocable.rs b/crates/test-ui/ui/main_thread_only_not_allocable.rs
index 614a1ceba..773306402 100644
--- a/crates/test-ui/ui/main_thread_only_not_allocable.rs
+++ b/crates/test-ui/ui/main_thread_only_not_allocable.rs
@@ -1,9 +1,9 @@
 use objc2::runtime::NSObject;
 #[expect(unused_imports)]
 use objc2::AllocAnyThread;
-use objc2::{declare_class, MainThreadOnly};
+use objc2::{define_class, MainThreadOnly};
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[thread_kind = MainThreadOnly]
     #[name = "MyMainThreadOnlyClass"]
diff --git a/crates/test-ui/ui/thread_kind_traits_unimplementable.rs b/crates/test-ui/ui/thread_kind_traits_unimplementable.rs
index 7a3696b29..6cca6f4ef 100644
--- a/crates/test-ui/ui/thread_kind_traits_unimplementable.rs
+++ b/crates/test-ui/ui/thread_kind_traits_unimplementable.rs
@@ -1,8 +1,8 @@
 //! Check that `MainThreadOnly`/`AllocAnyThread` traits are not implementable manually.
 use objc2::runtime::NSObject;
-use objc2::{declare_class, AllocAnyThread, MainThreadOnly};
+use objc2::{define_class, AllocAnyThread, MainThreadOnly};
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[thread_kind = AllocAnyThread]
     #[name = "Normal"]
@@ -12,7 +12,7 @@ declare_class!(
 
 unsafe impl MainThreadOnly for Normal {}
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[thread_kind = MainThreadOnly]
     #[name = "OnlyMain"]
diff --git a/crates/test-ui/ui/wrong_optional.rs b/crates/test-ui/ui/wrong_optional.rs
index 0cfed317b..61e705652 100644
--- a/crates/test-ui/ui/wrong_optional.rs
+++ b/crates/test-ui/ui/wrong_optional.rs
@@ -1,6 +1,6 @@
 use objc2::rc::Retained;
 use objc2::runtime::NSObject;
-use objc2::{declare_class, extern_class, extern_methods};
+use objc2::{define_class, extern_class, extern_methods};
 
 extern_class!(
     #[unsafe(super(NSObject))]
@@ -25,7 +25,7 @@ extern_methods!(
     }
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject1"]
     struct CustomObject1;
@@ -38,7 +38,7 @@ declare_class!(
     }
 );
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "CustomObject2"]
     struct CustomObject2;
diff --git a/crates/test-ui/ui/wrong_optional.stderr b/crates/test-ui/ui/wrong_optional.stderr
index ea7e87d17..2b01b7d32 100644
--- a/crates/test-ui/ui/wrong_optional.stderr
+++ b/crates/test-ui/ui/wrong_optional.stderr
@@ -29,7 +29,7 @@ error: `#[optional]` is only supported in `extern_protocol!`
 error: `#[optional]` is only supported in `extern_protocol!`
  --> ui/wrong_optional.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject1"]
   | |     struct CustomObject1;
@@ -38,12 +38,12 @@ error: `#[optional]` is only supported in `extern_protocol!`
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extern_methods_no_optional` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extern_methods_no_optional` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: `#[optional]` is only supported in `extern_protocol!`
  --> ui/wrong_optional.rs
   |
-  | / declare_class!(
+  | / define_class!(
   | |     #[unsafe(super(NSObject))]
   | |     #[name = "CustomObject2"]
   | |     struct CustomObject2;
@@ -52,4 +52,4 @@ error: `#[optional]` is only supported in `extern_protocol!`
   | | );
   | |_^
   |
-  = note: this error originates in the macro `$crate::__extern_methods_no_optional` which comes from the expansion of the macro `declare_class` (in Nightly builds, run with -Z macro-backtrace for more info)
+  = note: this error originates in the macro `$crate::__extern_methods_no_optional` which comes from the expansion of the macro `define_class` (in Nightly builds, run with -Z macro-backtrace for more info)
diff --git a/crates/tests/src/lib.rs b/crates/tests/src/lib.rs
index 793ab75b9..e18e1ca43 100644
--- a/crates/tests/src/lib.rs
+++ b/crates/tests/src/lib.rs
@@ -19,7 +19,7 @@ mod block;
 mod exception;
 mod rc_test_object;
 #[cfg(test)]
-mod test_declare_class_protocol;
+mod test_define_class_protocol;
 #[cfg(test)]
 mod test_encode_utils;
 #[cfg(test)]
diff --git a/crates/tests/src/test_declare_class_protocol.rs b/crates/tests/src/test_define_class_protocol.rs
similarity index 68%
rename from crates/tests/src/test_declare_class_protocol.rs
rename to crates/tests/src/test_define_class_protocol.rs
index 907a1b9be..7322b73e4 100644
--- a/crates/tests/src/test_declare_class_protocol.rs
+++ b/crates/tests/src/test_define_class_protocol.rs
@@ -1,21 +1,21 @@
 #![cfg(feature = "all")]
 use objc2::rc::Retained;
 use objc2::runtime::{NSObject, NSZone};
-use objc2::{declare_class, ClassType, ProtocolType};
+use objc2::{define_class, ClassType, ProtocolType};
 use objc2_foundation::NSCopying;
 
 #[test]
-#[should_panic = "could not create new class TestDeclareClassDuplicate. Perhaps a class with that name already exists?"]
-fn test_declare_class_duplicate() {
-    declare_class!(
+#[should_panic = "could not create new class TestDefineClassDuplicate. Perhaps a class with that name already exists?"]
+fn test_define_class_duplicate() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassDuplicate"]
+        #[name = "TestDefineClassDuplicate"]
         struct Custom1;
     );
 
-    declare_class!(
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassDuplicate"]
+        #[name = "TestDefineClassDuplicate"]
         struct Custom2;
     );
 
@@ -25,10 +25,10 @@ fn test_declare_class_duplicate() {
 }
 
 #[test]
-fn test_declare_class_protocol() {
-    declare_class!(
+fn test_define_class_protocol() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassProtocolNotFound"]
+        #[name = "TestDefineClassProtocolNotFound"]
         struct Custom;
 
         unsafe impl NSCopying for Custom {
@@ -46,12 +46,12 @@ fn test_declare_class_protocol() {
 #[test]
 #[cfg_attr(
     debug_assertions,
-    should_panic = "declared invalid method -[TestDeclareClassInvalidMethod description]: expected return to have type code '@', but found 'v'"
+    should_panic = "defined invalid method -[TestDefineClassInvalidMethod description]: expected return to have type code '@', but found 'v'"
 )]
-fn test_declare_class_invalid_method() {
-    declare_class!(
+fn test_define_class_invalid_method() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassInvalidMethod"]
+        #[name = "TestDefineClassInvalidMethod"]
         struct Custom;
 
         unsafe impl Custom {
@@ -69,10 +69,10 @@ fn test_declare_class_invalid_method() {
     debug_assertions,
     should_panic = "must implement required protocol method -[NSCopying copyWithZone:]"
 )]
-fn test_declare_class_missing_protocol_method() {
-    declare_class!(
+fn test_define_class_missing_protocol_method() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassMissingProtocolMethod"]
+        #[name = "TestDefineClassMissingProtocolMethod"]
         struct Custom;
 
         unsafe impl NSCopying for Custom {
@@ -85,10 +85,10 @@ fn test_declare_class_missing_protocol_method() {
 
 #[test]
 // #[cfg_attr(debug_assertions, should_panic = "...")]
-fn test_declare_class_invalid_protocol_method() {
-    declare_class!(
+fn test_define_class_invalid_protocol_method() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassInvalidProtocolMethod"]
+        #[name = "TestDefineClassInvalidProtocolMethod"]
         struct Custom;
 
         unsafe impl NSCopying for Custom {
@@ -108,10 +108,10 @@ fn test_declare_class_invalid_protocol_method() {
     debug_assertions,
     should_panic = "failed overriding protocol method -[NSCopying someOtherMethod]: method not found"
 )]
-fn test_declare_class_extra_protocol_method() {
-    declare_class!(
+fn test_define_class_extra_protocol_method() {
+    define_class!(
         #[unsafe(super(NSObject))]
-        #[name = "TestDeclareClassExtraProtocolMethod"]
+        #[name = "TestDefineClassExtraProtocolMethod"]
         struct Custom;
 
         unsafe impl NSCopying for Custom {
diff --git a/crates/tests/src/test_foundation_retain_semantics.rs b/crates/tests/src/test_foundation_retain_semantics.rs
index b7f98822c..e6af1f7a5 100644
--- a/crates/tests/src/test_foundation_retain_semantics.rs
+++ b/crates/tests/src/test_foundation_retain_semantics.rs
@@ -2,7 +2,7 @@
 use std::ptr;
 
 use objc2::rc::Retained;
-use objc2::{declare_class, extern_methods};
+use objc2::{define_class, extern_methods};
 use objc2_foundation::{
     CopyingHelper, NSArray, NSCopying, NSMutableArray, NSMutableCopying, NSMutableDictionary,
     NSMutableSet, NSNumber, NSSet, NSValue,
@@ -351,7 +351,7 @@ fn value_does_not_retain() {
     expected.assert_current();
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(RcTestObject))]
     #[name = "NSCopyingRcTestObject"]
     #[derive(Debug, PartialEq, Eq, Hash)]
diff --git a/framework-crates/objc2-app-kit/examples/delegate.rs b/framework-crates/objc2-app-kit/examples/delegate.rs
index 0dea656d2..1df9b33c9 100644
--- a/framework-crates/objc2-app-kit/examples/delegate.rs
+++ b/framework-crates/objc2-app-kit/examples/delegate.rs
@@ -1,7 +1,7 @@
 #![deny(unsafe_op_in_unsafe_fn)]
 use objc2::rc::Retained;
 use objc2::runtime::ProtocolObject;
-use objc2::{declare_class, msg_send_id, DeclaredClass, MainThreadMarker, MainThreadOnly};
+use objc2::{define_class, msg_send_id, DefinedClass, MainThreadMarker, MainThreadOnly};
 use objc2_app_kit::{NSApplication, NSApplicationActivationPolicy, NSApplicationDelegate};
 use objc2_foundation::{
     ns_string, NSCopying, NSNotification, NSObject, NSObjectProtocol, NSString,
@@ -18,7 +18,7 @@ struct Ivars {
     maybe_id_ivar: Option<Retained<NSString>>,
 }
 
-declare_class!(
+define_class!(
     // SAFETY:
     // - The superclass NSObject does not have any subclassing requirements.
     // - `AppDelegate` does not implement `Drop`.
diff --git a/framework-crates/objc2-foundation/src/copying.rs b/framework-crates/objc2-foundation/src/copying.rs
index a840c8fdd..a874172d5 100644
--- a/framework-crates/objc2-foundation/src/copying.rs
+++ b/framework-crates/objc2-foundation/src/copying.rs
@@ -116,12 +116,12 @@ extern_protocol!(
     /// Implement `NSCopying` for a custom class.
     ///
     /// ```
-    /// use objc2::{declare_class, msg_send_id, AllocAnyThread, DeclaredClass};
+    /// use objc2::{define_class, msg_send_id, AllocAnyThread, DefinedClass};
     /// use objc2::rc::Retained;
     /// use objc2::runtime::NSZone;
     /// use objc2_foundation::{CopyingHelper, NSCopying, NSObject};
     ///
-    /// declare_class!(
+    /// define_class!(
     ///     #[unsafe(super(NSObject))]
     ///     #[name = "CustomClass"]
     ///     struct CustomClass;
diff --git a/framework-crates/objc2-foundation/src/tests/auto_traits.rs b/framework-crates/objc2-foundation/src/tests/auto_traits.rs
index 4f2c5c028..d470826af 100644
--- a/framework-crates/objc2-foundation/src/tests/auto_traits.rs
+++ b/framework-crates/objc2-foundation/src/tests/auto_traits.rs
@@ -4,7 +4,7 @@ use core::panic::{RefUnwindSafe, UnwindSafe};
 use static_assertions::assert_not_impl_any;
 
 use crate::*;
-use objc2::declare_class;
+use objc2::define_class;
 use objc2::rc::Retained;
 use objc2::runtime::AnyObject;
 
@@ -29,7 +29,7 @@ fn assert_auto_traits<T: Send + Sync + UnwindSafe + RefUnwindSafe>() {
     assert_unwindsafe::<T>();
 }
 
-declare_class!(
+define_class!(
     #[unsafe(super(NSObject))]
     #[name = "SendSyncObject"]
     struct SendSyncObject;
diff --git a/framework-crates/objc2-metal/examples/triangle.rs b/framework-crates/objc2-metal/examples/triangle.rs
index 3b2c4d769..4e1e1fd40 100644
--- a/framework-crates/objc2-metal/examples/triangle.rs
+++ b/framework-crates/objc2-metal/examples/triangle.rs
@@ -6,7 +6,7 @@ use core::{cell::OnceCell, ptr::NonNull};
 
 use objc2::rc::Retained;
 use objc2::runtime::ProtocolObject;
-use objc2::{declare_class, msg_send_id, DeclaredClass, MainThreadMarker, MainThreadOnly};
+use objc2::{define_class, msg_send_id, DefinedClass, MainThreadMarker, MainThreadOnly};
 #[cfg(target_os = "macos")]
 use objc2_app_kit::{
     NSApplication, NSApplicationActivationPolicy, NSApplicationDelegate, NSBackingStoreType,
@@ -54,7 +54,7 @@ macro_rules! idcell {
     };
 }
 
-// declare the desired instance variables
+// The state of our application.
 struct Ivars {
     start_date: Retained<NSDate>,
     command_queue: OnceCell<Retained<ProtocolObject<dyn MTLCommandQueue>>>,
@@ -63,8 +63,7 @@ struct Ivars {
     window: OnceCell<Retained<NSWindow>>,
 }
 
-// declare the Objective-C class machinery
-declare_class!(
+define_class!(
     // SAFETY:
     // - The superclass NSObject does not have any subclassing requirements.
     // - `MainThreadOnly` is correct, since this is an application delegate.
diff --git a/framework-crates/objc2-web-kit/examples/browser.rs b/framework-crates/objc2-web-kit/examples/browser.rs
index 552e1552a..83637c657 100644
--- a/framework-crates/objc2-web-kit/examples/browser.rs
+++ b/framework-crates/objc2-web-kit/examples/browser.rs
@@ -4,10 +4,10 @@
 use core::cell::OnceCell;
 
 use objc2::{
-    declare_class, msg_send_id,
+    define_class, msg_send_id,
     rc::Retained,
     runtime::{AnyObject, ProtocolObject, Sel},
-    sel, DeclaredClass, MainThreadMarker, MainThreadOnly,
+    sel, DefinedClass, MainThreadMarker, MainThreadOnly,
 };
 #[allow(deprecated)]
 #[cfg(target_os = "macos")]
@@ -52,7 +52,7 @@ struct Ivars {
     window: OnceCell<Retained<NSWindow>>,
 }
 
-declare_class!(
+define_class!(
     // SAFETY:
     // - The superclass NSObject does not have any subclassing requirements.
     // - `MainThreadOnly` is correct, since this is an application delegate.