9 Grammatical Pitfalls


[dee-sel-uh-reyt] /diˈsɛl əˌreɪt/
verb (used with object), decelerated, decelerating.
to decrease the velocity of:
He decelerates the bobsled when he nears a curve.
to slow the rate of increase of:
efforts to decelerate inflation.
verb (used without object), decelerated, decelerating.
to slow down:
The plane decelerated just before landing.
Origin of decelerate
1895-1900; de- + (ac)celerate
Related forms
deceleration, noun
decelerator, noun
nondeceleration, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for decelerate
  • So that the brain may decelerate mental action, probably.
  • They introduced tough labor laws designed to decelerate production of lower-value-added goods.
  • decelerate smoothly, brake evenly, change gears as necessary.
  • If you belly flop, you decelerate quickly, and the impact feels rougher.
  • decelerate and yield to any pedestrians and traffic in the intersection.
  • Service brakes applied with no intent to decelerate the vehicle.
  • Cite factors which might accelerate or decelerate the work and your reason for taking this approach as opposed to others.
  • Start and stop your vehicle slowly when possible and decelerate before corners.
British Dictionary definitions for decelerate


to slow down or cause to slow down
Derived Forms
deceleration, noun
decelerator, noun
Word Origin
C19: from de- + accelerate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for decelerate

1899, back-formation from deceleration. Related: Decelerated; decelerating.

Online Etymology Dictionary, © 2010 Douglas Harper
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