reaction
n.-
1 response to an event (n.) B1 Intermediatesomething you say, feel, or do because of something else that happened.
a physiological or psychological response to a stimulus or event.
ExampleHis first reaction to the news was a look of pure surprise.
ExampleThe public reaction to the proposed tax increase was overwhelmingly negative, forcing the local council to reconsider its budget priorities.
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2 chemical change (n.) B2 Upper Intermediate Technical Sciencea process where two or more substances change into something new.
a process involving the rearrangement of the molecular or ionic structure of a substance.
ExampleThe chemical reaction caused the liquid to turn bright green.
ExampleThe catalyst was added to accelerate the reaction, ensuring that the compound reached stability before the temperature dropped.
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3 online emoji (n.) B1 Intermediate Informal Computingan icon or emoji you use to show how you feel about a post on social media.
a digital feedback mechanism, typically an emoji, used to express a specific sentiment toward online content.
ExampleShe got over fifty heart reactions on her new photo.
ExampleThe platform introduced several new reactions, allowing users to express nuanced emotions beyond a simple 'like' button.
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4 political resistance (n.) C1 Advanced Academic Formal Politicsa movement that opposes social or political change.
opposition to political or social progress or reform; reactionary policy.
ExampleThe new law met with strong reaction from traditional groups.
ExampleThe revolution was followed by a period of intense political reaction, as the old elite sought to dismantle the newly established democratic institutions.
Inherited from Middle English reaccion, from Old French reaction, from Latin reāctiō, from the verb reagō, from re- (“again”) + agō (“to act”); more at re-, action; equivalent to react + -ion.
- Nounoverreaction
- Nounreaction