REACTION Synonyms: 17 Similar and Opposite Words

reaction

noun

rē-ˈak-shən

Definition of reaction

as in response

action or behavior that is done in return to other action or behavior we were startled by her extreme reaction to being jilted by her boyfriend

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

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.

Recent Examples of reaction These reactions require a lot of energy, which can reduce the efficiency of zinc-air batteries and cause their materials to wear out faster. — Georgina Jedikovska, Interesting Engineering, 15 Oct. 2026 The American Academy of Pediatrics’ guidance on communicating with teens already recommends listening without judgment, avoiding exaggerated reactions and giving teenagers space to work through their concerns. — Ashley Lynch, Charlotte Observer, 15 Oct. 2026 Industry reactions to some of these bold decisions, however, feel louder this year. — Clayton Davis, Variety, 15 Oct. 2026 Furthermore, the scientists highlighted a potential for liver damage, allergic reactions, or other serious consequences. — Amy Maxmen, Miami Herald, 15 Oct. 2026 See All Example Sentences for reaction

Recent Examples of Synonyms for reaction

Noun

Their responses were not edited and are in the candidates’ own words.

— Rachel Royster, Fort Worth Star-Telegram, 19 Oct. 2026
More than 350 flights were canceled or delayed at Moscow airports, local media reported, as planes were grounded in response to incoming drones.

— Arkansas Online, Arkansas Online, 18 Oct. 2026

Definition of response

Noun

Changing the nozzle instead of the color Creality's answer is called KliTek, a four-channel system that takes a slightly different approach.

— New Atlas, New Atlas, 17 Oct. 2026
They are discovered well beyond the bounds of the strategic map, where the winds shift, the old answers sink, and the pilot must find the way by dead reckoning.

— Jeff DeGraff, Fortune, 17 Oct. 2026