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verb American English pronunciation: accelerate /əkˈseləˌreɪt/ 
Word Forms
present tense
present participleaccelerating
past tenseaccelerated
past participleaccelerated
  1. 1
    [intransitive/transitive] to happen or make something happen at a faster rate

    The increased capital could greatly accelerate economic development.

    The decline of her health seemed to suddenly accelerate.

  2. 2
    [intransitive] if a vehicle accelerates, it moves faster

    Suddenly the truck accelerated and shot forward.

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