revPronunciation: (rev), [key]
—n., v., revved, rev•ving.
a revolution (in an engine or the like).
to accelerate sharply the speed of (an engine or the like) (often fol. by up
(of an engine) to accelerate; become revved (often fol. by up
2. rev up,
to increase in strength or accelerate sharply: The economy is beginning to rev up.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.