a female donkey

• also, the female of certain animals such as a wren or a crab

a multi-spindle spinning machine for turning fiber into thread

• also called the spinning jenny

in billiards or snooker, a powerful follow shot with heavy topspin

to wind finished lace onto cards for sale

a member of the former British Women's Royal Naval Service

the Curtiss JN-4 biplane, a World War I era trainer nicknamed Jenny

uppercase spelling of jenny used as a common noun