Definition of ACCELERATE

to become greater in size, extent, volume, amount, or number <toy purchases accelerate dramatically during the Christmas season>
to cause to move or proceed fast or faster <we accelerated preparations for the hurricane upon hearing weather reports that it had gained speed>
Antonyms brake, decelerate, retard, slow (down)
to make greater in size, amount, or number <the company accelerated its advertising purchases even as the economy appeared to be in recession>

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