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[ree-in-fawrs-muh nt, -fohrs-] /ˌri ɪnˈfɔrs mənt, -ˈfoʊrs-/
the act of reinforcing.
the state of being reinforced.
something that reinforces or strengthens.
Often, reinforcements. an additional supply of personnel, ships, aircraft, etc., for a military force.
a system of steel bars, strands, wires, or mesh for absorbing the tensile and shearing stresses in concrete work.
  1. a procedure, as a reward or punishment, that alters a response to a stimulus.
  2. the act of reinforcing a response.
Origin of reinforcement
1600-10; reinforce + -ment
Related forms
nonreinforcement, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for reinforcements
  • Construction is forbidden within red zones, while buildings in blue zones must include reinforcements or other defenses.
  • Soon after the surrender two regiments of reinforcements arrived, and after a severe fight were compelled to surrender.
  • They must give us food and boots and reinforcements, or soon there will be left only empty trenches.
  • It contains seven drainage ditches and stone reinforcements along some stretches.
  • Windows cut out along a back stairwell expose old bar reinforcements.
  • Police reinforcements, brought in after two nights of car-burning and confrontation, helped to calm the streets.
  • Supplies of food and water are running low, and red-shirt reinforcements are being prevented from joining the protests.
  • The government has sent reinforcements but so far they have failed to retake the town.
  • reinforcements arrive, but not before martyrs are made.
  • They blocked the ferry until dawn to prevent the police from getting reinforcements.
Word Origin and History for reinforcements



c.1600, "act of reinforcing," from reinforce + -ment. Meaning "an augmentation, that which reinforces" is from 1650s. Related: Reinforcements.

Online Etymology Dictionary, © 2010 Douglas Harper
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reinforcements in Medicine

reinforcement re·in·force·ment (rē'ĭn-fôrs'mənt)

  1. The act or process of reinforcing.

  2. Something that reinforces.

  3. The occurrence or experimental introduction of an unconditioned stimulus along with a conditioned stimulus.

  4. The strengthening of a conditioned response by such means.

  5. An event, a circumstance, or a condition that increases the likelihood that a given response will recur in a situation like that in which the reinforcing condition originally occurred.

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