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WordReference Random House Learner's Dictionary of American English © 2016
ac•cel•er•ate /ækˈsɛləˌreɪt/USA pronunciation   v., -at•ed, -at•ing. 
  1. to (cause to) develop, progress, or advance faster: [no object]The unemployment rate accelerated.[+ object]Those policies accelerated unemployment.
  2. to increase the speed (of): [+ object]The driver accelerated the car.[no object]The car accelerated.
  3. to hasten the occurrence of[+ object]The economic policies accelerated the recession.
ac•cel•er•a•tion /ækˌsɛləˈreɪʃən/USA pronunciation  n. [uncountable]See -celer-.

WordReference Random House Unabridged Dictionary of American English © 2016
ac•cel•er•ate  (ak selə rāt′), 
v., -at•ed, -at•ing. 

  1. to cause faster or greater activity, development, progress, advancement, etc., in:to accelerate economic growth.
  2. to hasten the occurrence of:to accelerate the fall of a government.
  3. Mechanics[Mech.]to change the velocity of (a body) or the rate of (motion);
    cause to undergo acceleration.
  4. to reduce the time required for (a course of study) by intensifying the work, eliminating detail, etc.

  1. to move or go faster;
    increase in speed.
  2. to progress or develop faster.
  • Latin accelerātus speeded up (past participle of accelerāre), equivalent. to ac- ac- + celer swift + -ātus -ate1
  • 1515–25
ac•celer•a•ble, adj. 
ac•celer•at′ed•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

accelerate /ækˈsɛləˌreɪt/ vb
  1. to go, occur, or cause to go or occur more quickly; speed up
  2. (transitive) to cause to happen sooner than expected
  3. (transitive) to increase the velocity of (a body, reaction, etc); cause acceleration
Etymology: 16th Century: from Latin accelerātus, from accelerāre to go faster, from ad- (intensive) + celerāre to hasten, from celer swift

acˈcelerative, acˈceleratory adj

'accelerate' also found in these entries:

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