Meaning of REACT in English

REACT

/ riˈækt; NAmE / verb [ v ]

1.

react (to sth) (by doing sth) to change or behave in a particular way as a result of or in response to sth :

Local residents have reacted angrily to the news.

I nudged her but she didn't react.

You never know how he is going to react.

The market reacted by falling a further two points.

2.

to become ill / sick after eating, breathing, etc. a particular substance :

People can react badly to certain food additives.

3.

react (with sth) | react (together) ( chemistry ) ( of substances ) to experience a chemical change when coming into contact with another substance :

Iron reacts with water and air to produce rust.

PHRASAL VERBS

- react against sb/sth

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WORD ORIGIN

mid 17th cent.: from re- (expressing intensive force or reversal) + act , originally suggested by medieval Latin react- done again, from the verb reagere .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.