rev / rev/ inf. • n. (usu. revs) a revolution of an engine per minute: an engine speed of 1,750 revs. ∎ an act of increasing the speed of revolution of a vehicle's engine by pressing the accelerator, esp. while the clutch is disengaged.• v. (revved, rev·ving) [tr.] increase the running speed of (an engine) or the engine speed of (a vehicle) by pressing the accelerator, esp. while the clutch is disengaged: he got into the car, revved up the engine and drove off| [intr.] I revved up enthusiastically. ∎ [intr.] (of an engine or vehicle) operate with increasing speed when the accelerator is pressed, esp. while the clutch is disengaged: he could hear the sound of an engine revving nearby | fig. he's revving up for next week's World Cup game.