I.
noun ⇨ See also ↑ revolution
ADJECTIVE
▪ high , low (both esp. BrE )
▪
The engine is almost silent at low ~s.
▪ engine
REV + NOUN
▪ counter ( BrE )
PHRASES
▪ ~s a minute , ~s per minute
II.
verb
Rev is used with these nouns as the subject: ↑ engine
Rev is used with these nouns as the object: ↑ engine , ↑ motorcycle