Meaning of REACTION in English

REACTION

■ noun

1》 an instance of reacting to or against something.

↘( ~s ) a person's ability to respond physically and mentally to external stimuli.

2》 opposition to political or social progress or reform.

3》 a process in which substances interact causing chemical or physical change.

4》 Physics a force exerted in opposition to an applied force.

Derivatives

~ist noun & adjective

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.