n. A female bird; used especially as a prefix, as in jenny-heron, jenny-howlet, jenny-jay, jenny-wren, etc.n. Specifically A wren: usually called jenny-wren.n. A female ass: also called jenny-ass.n. n. A locomotive-crane; a self-propelling crane used for carrying heavy weights.n. Compasses with one end bent inward.n. A stroke iu English billiards, originally a losing hazard made from balk into a middle pocket, the object-ball being near the pocket, but below it: now applied to any acute-angled pocketing placed from balk to a ball outside, and thence into any of the four pockets beyond balk.