English Lexicon

React

/riˈækt/
verbCEFR B2 (Upper)Top #950 frequency
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Comprehensive Definitions & Senses

2 senses
As verb
  1. 1

    To respond to something by taking action.

    "She had to react quickly to the unexpected news."
  2. 2

    To undergo a change as a result of a stimulus.

    "The chemicals will react when mixed together."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Late Latin prefix re- (again, back) combined with actus (participle of agere, to do or drive). Entering English in the early 17th century, it initially meant to act in return or reciprocate, later broadening to describe chemical, physical, or emotional responses to stimuli.

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