Deceleration - Definition
deceleration
n 1: a decrease in rate of change; "the deceleration of the arms
race" [syn: deceleration, slowing, retardation] [ant:
acceleration]
2: (physics) a rate of decrease in velocity [ant:
acceleration]
3: the act of decelerating; decreasing the speed; "he initiated
deceleration by braking" [ant: acceleration, quickening,
speedup]