verb
revs; revved; revving
[+ obj] :to cause (an engine) to run more quickly :to increase the revolutions per minute of (a motor in a vehicle)
rev up
[phrasal verb] informal
to become more active
rev (someone or something) up or rev up (someone or something) :to make (someone or something) more active or effective
noun
plural revs
[count] informal :a complete turn of an engine part :revolution
usually plural