Meaning of hair trigger

hair' trig"ger

Pronunciation: [key]
  1. a trigger that allows the firing mechanism of a firearm to be operated by very slight pressure.

hair-trig•ger

Pronunciation: (hâr'trig"ur), [key]
— adj.
  1. easily activated or set off; reacting immediately to the slightest provocation or cause: a hair-trigger temper.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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