WordReference Random House Learner's Dictionary of American English © 2014
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. [+ object] to hasten the occurrence of:The economic policies accelerated the recession.
ac•cel•er•a•tion /ækˌsɛləˈreɪʃən/USA pronunciation n. [uncountable]See -celer-.

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:
In the English description:

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