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[ree-in-fawrs, -fohrs] /ˌri ɪnˈfɔrs, -ˈfoʊrs/
verb (used with object), reinforced, reinforcing.
to strengthen with some added piece, support, or material:
to reinforce a wall.
to strengthen (a military force) with additional personnel, ships, or aircraft:
to reinforce a garrison.
to strengthen; make more forcible or effective:
to reinforce efforts.
to augment; increase:
to reinforce a supply.
Psychology. to strengthen the probability of (a response to a given stimulus) by giving or withholding a reward.
something that reinforces.
a metal band on the rear part of the bore of a gun, where the explosion occurs.
Also, reenforce, re-enforce.
1590-1600; re- + inforce, alteration of enforce
Related forms
reinforcer, noun
self-reinforcing, adjective
unreinforced, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for reinforces
  • Your article reinforces our conclusion that the flood prevention benefits of such a measure would be dramatic.
  • The short lifetime of many alluvial deposits often reinforces this dynamic.
  • The mobile team sees the hardest cases and reinforces the authority of the village health worker.
  • It reinforces our conviction that strategic investments can make a huge difference in poor people's lives.
  • While this study may lessen a bit of my guilt for traveling by plane, it truly reinforces my preference for the train.
  • Reason must be accompanied by the emotion that supports or reinforces it.
  • Disappointing because it reinforces the notion that scientists are socially inept and unconsciously repressed types.
  • The painted shells discovery only reinforces the previous theory that they had brains which allowed them to craft things.
  • Our use of fossil fuels only reinforces this thought.
  • Science underlines those doubts and reinforces them.
British Dictionary definitions for reinforces


verb (transitive)
to give added strength or support to
to give added emphasis to; stress, support, or increase: his rudeness reinforced my determination
to give added support to (a military force) by providing more men, supplies, etc
(psychol) to reward an action or response of (a human or animal) so that it becomes more likely to occur again
Derived Forms
reinforcement, noun
Word Origin
C17: from obsolete renforce, from French renforcer; see re- + inforceenforce
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 reinforces



c.1600, originally in military sense, from re- "again" + enforce (cf. re-enforce). Related: Reinforced; reinforcing.

Online Etymology Dictionary, © 2010 Douglas Harper
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reinforces in Medicine

reinforce re·in·force (rē'ĭn-fôrs')
v. re·in·forced, re·in·forc·ing, re·in·forc·es

  1. To give more force or effectiveness to something; strengthen.

  2. To reward an individual, especially an experimental subject, with a reinforcer subsequent to a desired response or performance.

  3. To stimulate a response by means of a reinforcer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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