1. a decrease in rate of change

- the deceleration of the arms race

Similar word(s): retardation, slowing

Definition categories: attribute, alteration, change, modification

2. (physics) a rate of decrease in velocity

Definition categories: time, rate

3. the act of decelerating; decreasing the speed

- he initiated deceleration by braking

Definition categories: act, hurrying, speed, speeding

Sentences with deceleration as a noun:

- The rocket is now in deceleration.

- The brakes produce a deceleration of 10 metres per second per second.