diff --git a/compiler/rustc_resolve/src/build_reduced_graph.rs b/compiler/rustc_resolve/src/build_reduced_graph.rs
index e06ca59771e6..f0dffd8829da 100644
--- a/compiler/rustc_resolve/src/build_reduced_graph.rs
+++ b/compiler/rustc_resolve/src/build_reduced_graph.rs
@@ -60,7 +60,7 @@ pub(crate) fn plant_decl_into_local_module(
         }
     }
 
-    /// Create a name definitinon from the given components, and put it into the local module.
+    /// Create a name definition from the given components, and put it into the local module.
     fn define_local(
         &mut self,
         parent: Module<'ra>,
@@ -76,7 +76,7 @@ fn define_local(
         self.plant_decl_into_local_module(ident, orig_ident.span, ns, decl);
     }
 
-    /// Create a name definitinon from the given components, and put it into the extern module.
+    /// Create a name definition from the given components, and put it into the extern module.
     fn define_extern(
         &self,
         parent: Module<'ra>,
diff --git a/typos.toml b/typos.toml
index c65e2ba293e5..25083174cb8f 100644
--- a/typos.toml
+++ b/typos.toml
@@ -45,6 +45,7 @@ unstalled = "unstalled" # short for un-stalled
 # the non-empty form can be automatically fixed by `--bless`.
 #
 # tidy-alphabetical-start
+definitinon = "definition"
 # tidy-alphabetical-end
 
 [default.extend-identifiers]