Jenny \Jen"ny\, n.; pl. {Jennies}. [1913 Webster] 1. A familiar or pet form of the proper name Jane. [1913 Webster] 2. (Zool.) A familiar name of the European wren. [1913 Webster] {Jenny ass} (Zool.), a female ass; also, a female of certain other animals. [1913 Webster +PJC]