noun Someone or something that jumps, e.g. a participant in a jumping event in track or skiing.
noun A person who attempts suicide by jumping from a great height.
noun A short length of electrical conductor, to make a temporary connection.
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noun An electrical connection between the vehicles of a train, usually a passenger train; a jumper cable.
noun A removable connecting pin on an electronic circuit board.
noun A long drilling tool used by masons and quarry workers, consisting of an iron bar with a chisel-edged steel tip at one or both ends, operated by striking it against the rock, turning it slightly with each blow.
noun A crude kind of sleigh, usually a simple box on runners which are in one piece with the poles that form the thills.