overreacted; overreacting

intransitive verb

: to react to something too strongly : to respond to something with too strong an emotion or with unnecessary or excessive action
I was furious and yelled at him. He told me I was overreacting and to "chillax."Ben Stein
The world isn't coming to an end. You shouldn't overreact to the negative news.Adam Bryant
Some of his animals had become apprehensive and twitchy, overreacting to sound or touch …Mark Caldwell
But the military police overreacted, using tear gas, rubber bullets and excessive force in front of news cameras that spread the images countrywide.Grant Wahl
… the poisonous surfeit of hormones produced by the overreacting immune system.Shannon Brownlee
Sometimes companies in a little bit of trouble are the best investments because the market has overreacted.Orson C. Clay
overreaction noun
plural overreactions
… he had said almost angrily that he couldn't tell her anything without eliciting a huge overreaction. Ann Beattie
This response is an overreaction by your immune system to an otherwise harmless substance, such as pollen or pet dander. Medical Clinic Health Letter

Examples of overreact in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Still, Cramer cautioned against overreacting to relatively small moves in crude, noting oil remains well below its recent highs. Alexa Lomonaco, CNBC, 11 Aug. 2026 By the 1990s, research suggested that certain childhood infections helped the body tune its immune system, instead of overreacting to dust, pollen and other allergens. Baltimore Sun, Boston Herald, 9 Aug. 2026 Secondly, markets may overreact to a piece of data or a policymaker tidbit, pricing in hikes or cuts that the central bank then fails to deliver. Eleanor Pringle, Fortune, 4 Aug. 2026 And as much as fans want to overreact to one play, the position switch – remember, Proctor played left tackle his entire career at Alabama – as well as the jump to the NFL can’t be disregarded. Miami Herald, 1 Aug. 2026 See All Example Sentences for overreact

Word History

First Known Use

1919, in the meaning defined above

Time Traveler
The first known use of overreact was in 1919

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Cite this Entry

“Overreact.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overreact. Accessed 13 Aug. 2026.

Medical Definition

overreact

intransitive verb
: to react excessively or too strongly
the body's immune system overreacts to the endotoxinTina Adler

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