Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: deceleration  dee,se-lu'rey-shun
  1. A decrease in rate of change
    "the deceleration of the arms race";
    - slowing, retardation
  2. (physics) a rate of decrease in velocity
  3. The act of decelerating; decreasing the speed
    "he initiated deceleration by braking"

Derived forms: decelerations

Type of: alteration, change, hurrying, modification, rate, speed, speeding

Antonym: acceleration

Encyclopedia: Deceleration