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Comprehensive
Dictionary Suite
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compression the reduction in volume and increase in pressure of air or air mixed with fuel in the cylinder of an internal combustion engine prior to ignition, or the engine cycle in which this process takes place. [1/3 definitions]
hot-wire (informal) to start (an automobile or the like) by crossing or connecting the ignition wires, rather than by using a key.
ignition in an automobile or the like, the switch that activates the ignition system. [1/3 definitions]
jump-start to start (a motor vehicle) either by rolling or pushing (it) with the ignition on and suddenly releasing the clutch, or by connecting the dead battery to a live battery with jumper cables. [1/2 definitions]
preignition in an internal-combustion engine, the ignition of fuel before the spark plug fires.
reignition combined form of ignition.
spontaneous combustion the ignition of a substance or material, such as oily cloths or wet hay, caused by the rapid increase of heat from chemical reactions in the substance.