diff --git a/11ty/definitions/trans.md b/11ty/definitions/trans.md
index 261e480d..6f5c80dd 100644
--- a/11ty/definitions/trans.md
+++ b/11ty/definitions/trans.md
@@ -5,6 +5,8 @@ defined: false
 sub_terms:
   - text: -femme
     full_title: Trans-Femme
+  - text: -feminine
+    full_title: Transfeminine
   - text: -gender
     full_title: Transgender
   - text: man
diff --git a/11ty/definitions/transfeminine.md b/11ty/definitions/transfeminine.md
new file mode 100644
index 00000000..ae84083e
--- /dev/null
+++ b/11ty/definitions/transfeminine.md
@@ -0,0 +1,10 @@
+---
+title: Transfeminine
+slug: transfeminine
+speech: adj
+defined: true
+---
+
+describes a [transgender](/definitions/transgender) person for whom femininity forms part of their gender.
+
+For example, a transfeminine person may be a binary transgender woman; they may also be a [non-binary](/definitions/non-binary) person with a gender adjacent to female, or with multple genders including female.