- revolution per minute
- (often followed by up) to increase the speed of revolution of (an engine)
WordReference Random House Learner's Dictionary of American English © 2015
rev /rɛv/USA pronunciation n., v., revved, rev•ving.[Informal.]
~ + up] to increase in activity or speed:The economy began to rev up.
Collins Concise English Dictionary © HarperCollins Publishers::
rev /rɛv/ informal n