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or re-enforce

[ree-uh n-fawrs, -fohrs] /ˌri ənˈfɔrs, -ˈfoʊrs/
verb (used with object), reenforced, reenforcing, noun


[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.
Origin of reinforce
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. 2018.
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Examples from the Web for reenforce
Historical Examples
  • And a big diamond glinted as though to reenforce the remark.

    In to the Yukon William Seymour Edwards
  • There was no time even to call a single man of the Folk to reenforce him.

    Darkness and Dawn George Allan England
  • Dallas called, moving a kitchen table to reenforce the lock.

    When a Man Marries Mary Roberts Rinehart
  • In order to reenforce the armies and to push the war through, there was plainly but one course to be followed—conscription.

    Abraham Lincoln and the Union Nathaniel W. Stephenson
  • Moreover, a new factor had come in to reenforce the soldier's instinctive preference for gentlemen over shopkeepers.

    The Canadian Dominion Oscar D. Skelton
  • Squire remained to care for the crops of the two families, and agreed to reenforce the hunters late in the autumn.

    Daniel Boone

    Reuben Gold Thwaites
  • There was an imperative call for American aid to reenforce the French along the Marne and on the western side of the salient.

  • Increases in appropriations are necessary and will be asked for in order to reenforce these offices.

  • The open sea behind gave opportunity to Heraclius to reenforce the garrison continually.

  • In 1642, to reenforce these ministers, came three more from New England, actively averse to conformity.

British Dictionary definitions for reenforce


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 reenforce



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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reenforce 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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