Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Dutch
Origin: trekker, from Middle Dutch trecken 'to pull'; TREK2

trigger

1 noun
     
trigger
Related topics: Weapons
trig‧ger1 [countable]
1PMW the part of a gun that you pull with your finger to fire it
pull/squeeze the trigger
He took aim and squeezed the trigger.
2

be the trigger (point) (for something)

to be the thing that quickly causes a serious problem:
The hijacking became a trigger point for military action.

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