diff --git a/parso/python/tree.py b/parso/python/tree.py
index 1a01110..8d7475c 100644
--- a/parso/python/tree.py
+++ b/parso/python/tree.py
@@ -184,6 +184,9 @@ class Name(_LeafWithoutNewlines):
                                    self.line, self.column)
 
     def is_definition(self):
+        """
+        Returns True if the name is being defined.
+        """
         return self._get_definition() is not None
 
     def _get_definition(self):