react Definition in the Cambridge English Dictionary
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Definition of “react” - English Dictionary

Definition of "react" - American English Dictionary

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reactverb [I]

 us   /riˈækt/
to ​act in a ​particular way as a ​directresult of something ​else: How do you ​think she’ll react when she ​hears the ​news? The ​StateDepartment reacted ​favorably to the ​proposal. chemistry If ​substances react, they ​change when ​brought together.
(Definition of react from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "react" - British English Dictionary

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reactverb [I]

uk   us   /riˈækt/
B2 to ​act in a ​particular way as a ​directresult of something ​else: She ​slapped him and called him ​names, but he didn't react. The ​judge reacted ​angrily to the ​suggestion that it hadn't been a ​fairtrial. Many ​people react (​badly) to (= are made ​ill by)penicillin. chemistry to ​change in a ​physical or ​chemical way when put with another ​substance: Potassium reacts withwater.
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(Definition of react from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "react" - Business English Dictionary

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reactverb [I]

uk   us   /riˈækt/
if ​prices or ​markets react, their ​levelsrise or ​fall as a ​directresult of something that ​happens: react to sth How did ​bankshareprices react to last year's ​financialresults?react badly/favourably/positively The ​market reacted ​positively to last week's ​news of the £53.7m ​bid.react with sth The ​shares reacted with a 22p ​fall to 684p.
to ​behave in a particular way as a ​directresult of something else: react calmly/​cautiously react quickly/​stronglyreact to sth The ​union reacted angrily to the threat of ​joblosses.react by doing sth China has reacted to ​reports of unsafe ​products by cracking down on its own ​manufacturers.
(Definition of react from the Cambridge Business English Dictionary © Cambridge University Press)
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