acceleration

The definition of acceleration is a change in the rate of motion, speed or action.

(noun)

An example of acceleration is increasing your driving speed from 45 to 55 to merge with traffic.

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See acceleration in Webster's New World College Dictionary

noun

  1. an accelerating or being accelerated
  2. the rate of change in the velocity of a moving body: abbrev. a

See acceleration in American Heritage Dictionary 4

noun
  1. a. The act of accelerating.
    b. The process of being accelerated.
  2. Abbr. a Physics The rate of change of velocity with respect to time.

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