Meaning of TRIGGER in English

TRIGGER

/ ˈtrɪgə(r); NAmE / noun , verb

■ noun

1.

the part of a gun that you press in order to fire it :

to pull / squeeze the trigger

He kept his finger on the trigger.

2.

trigger (for sth) | trigger (to sth / to do sth) something that is the cause of a particular reaction or development, especially a bad one :

The trigger for the strike was the closure of yet another factory.

3.

the part of a bomb that causes it to explode :

nuclear triggers

■ verb [ vn ]

1.

trigger sth (off) to make sth happen suddenly

SYN set off :

Nuts can trigger off a violent allergic reaction.

2.

to cause a device to start functioning

SYN set off :

to trigger an alarm

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WORD ORIGIN

early 17th cent.: from dialect tricker , from Dutch trekker , from trekken to pull.

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