diff --git a/lib/securerandom.rb b/lib/securerandom.rb
index 720c883adf..b1477aa5b1 100644
--- a/lib/securerandom.rb
+++ b/lib/securerandom.rb
@@ -215,7 +215,7 @@ module SecureRandom
     end
   end
 
-  # SecureRandom.uuid generates a v4 random UUID.
+  # SecureRandom.uuid generates a v4 random UUID (Universally Unique IDentifier).
   #
   #   p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594"
   #   p SecureRandom.uuid #=> "62936e70-1815-439b-bf89-8492855a7e6b"