Definition of 'acceleration'

Noun

1. an increase in rate of change; "modern science caused an acceleration of cultural change"
      Antonyms: deceleration slowing retardation
2. the act of accelerating; increasing the speed
      Synonyms: quickening speedup
      Antonyms: deceleration
3. (physics) a rate of increase of velocity
      Antonyms: deceleration

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