n. A revolution, as of a motor.v. To increase the speed of (a motor, for example): revved the engine. v. To accelerate or increase: orders to rev up factory output. v. To make livelier or more productive: revving ourselves up for the game; efforts to rev the economy. verb-intransitive. To operate at an increased speed: heard the motors revving. verb-intransitive. To accelerate in quantity or activity.