hair trigger

The definition of a hair trigger is a gun trigger that goes off with a very light squeeze.

(noun)

An example of a hair trigger is a pistol that's been adjusted so it goes off very easily.

Hair trigger defines something that responds or happens easily or without cause.

(adjective)

An example of hair trigger is a person who gets angry instantly; a hair trigger temper.

See hair trigger in Webster's New World College Dictionary

a trigger so delicately adjusted that a very slight pressure on it discharges the firearm

adjective

set in motion or operation by a very slight impulse

Origin: see hair trigger

See hair trigger in American Heritage Dictionary 4

noun

A gun trigger adjusted to respond to a very slight pressure.

adjective

Responding to the slightest provocation or stimulation: a hair-trigger temper; a hair-trigger reaction.

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