n. One who or that which relieves or gives relief.n. In gunnery, an iron ring fixed to a handle by means of a socket, which serves to disengage the searcher of a gun when one of its points is retained in a hole.n. A garment kept for being lent out.n. In mech.: A release; a device for releasing some part of a mechanism at a certain time or position.n. A device, such as a spring or elastic substance, for preventing shocks on a machine or part.