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, especially while the clutch is disengaged.
verb (revs, revving, revved)
increase the running speed of (an engine) or the engine speed of (a vehicle) by pressing the accelerator, especially while the clutch is disengaged:he got into the car, revved up the engine and drove off [no object]:I revved up enthusiastically
[no object] (of an engine or vehicle) operate with increasing speed when the accelerator is pressed, especially while the clutch is disengaged:he could hear the sound of an engine revving nearby
make or become more active or energetic: [no object]:he’s revving up for next week’s World Cup game [with object]:we need to rev up the economy