Meaning of acceleration

ac•cel•er•a•tion

Pronunciation: (ak-sel"u-rā'shun), [key]
— n.
  1. the act of accelerating; increase of speed or velocity.
  2. a change in velocity.
  3. the time rate of change of velocity with respect to magnitude or direction; the derivative of velocity with respect to time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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