If you talk about the revs of an engine, you are referring to its speed, which is measured in revolutions per minute. The engine delivers instant acceleration whatever the revs. Reverend a title used before the name of a minister of the Christian church. rev up if you rev an engine, or if an engine revs, you make it work faster rev up if you rev up a system or organization, or if it revs up, it becomes more active rev up for. a complete turn of a wheel or engine part, used as a unit for measuring the speed of an engine = revolution
When the engine of a vehicle revs, or when you rev it, the engine speed is increased as the accelerator is pressed. The engine started, revved and the car jerked away down the hill The old bus was revving its engine, ready to start the journey back towards Madrid. Rev up means the same as rev. drivers revving up their engines. the sound of a car revving up
The spelling Rev is also used. Rev. is a written abbreviation for Reverend. the Rev John Roberts