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[oh-ver-ree-akt] /ˌoʊ vər riˈækt/
verb (used without object)
to react or respond more strongly than is necessary or appropriate.
Origin of overreact
1960-65; over- + react
Related forms
overreaction, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for overreact
  • Markets always overreact in the short run, even if the news is essentially non action-worthy.
  • Food allergies occur when immune cells overreact to a foreign substance.
  • It is extremely important not to overreact to the emergence of new nuclear powers.
  • Although the microchip needle is larger than a typical vaccine needle, animals do not usually overreact it.
  • Noise traders generally have poor timing, follow trends, and overreact to good and bad news in the market.
  • While some people may overreact, some won't bat an eye.
  • Regulators are working to ensure that lenders do not overreact and limit credit access to creditworthy borrowers.
  • Don't overreact to moodiness and exaggerated positions.
  • However, when you are near these allergens, your body can overreact in a number of ways.
  • We also didn't want to overreact to temporary conditions in the economy by charging businesses too much.
British Dictionary definitions for overreact


(intransitive) to react excessively to something
Derived Forms
overreaction, noun
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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overreact in Medicine

overreact o·ver·re·act (ō'vər-rē-ākt')
v. o·ver·re·act·ed, o·ver·re·act·ing, o·ver·re·acts
To react with unnecessary or inappropriate force, emotional display, or violence.

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