n. & v. colloq.
n. (in pl.) the number of revolutions of an engine per minute (running at 3,000 revs).
v. (revved, revving) 1 intr. (of an engine) revolve; turn over. 2 tr. (also absol.; often foll. by up) cause (an engine) to run quickly. rev counter = revolution counter.
[ abbr. ]