trigger Meaning, Definition & Usage

noun lever that activates the firing mechanism of a gun
gun trigger.
noun a device that activates or releases or causes something to happen
noun an act that sets in motion some course of events
initiation; induction.
verb put in motion or move to act
activate; touch off; trigger off; actuate; set off; spark off; spark; trip.
- trigger a reaction
- actuate the circuits
verb release or pull the trigger on
- Trigger a gun

For older tricker, from D. trekker, fr. trekken to draw, pull. See Trick, n.

A catch to hold the wheel of a carriage on a declivity.
(Mech.) A piece, as a lever, which is connected with a catch or detent as a means of releasing it; especially (Firearms), the part of a lock which is moved by the finger to release the cock and discharge the piece.