hair-trigger

1 of 2

adjective

hair-trig·​ger ˈher-ˌtri-gər How to pronounce hair-trigger (audio)
1
: immediately responsive to the slightest stimulus
a hair-trigger temper
2
: delicately adjusted or easily disrupted

hair trigger

2 of 2

noun

: a gun trigger so adjusted as to permit the firearm to be fired by a very slight pressure

Examples of hair-trigger in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The real uncertainties in the bond market are lodged in the larger complexities and flammable preconditions resulting from highly leveraged speculative positions set to unwind on a hair-trigger. George Calhoun, Forbes.com, 25 May 2025 But does the Sandman still have the fire in him to play a hockey player turned golfer powered by his hair-trigger temper? A.a. Dowd, Vulture, 20 May 2025
Noun
The frantic trading, which sent stocks spiking before plummeting again, showed how investors are operating on a hair trigger and are eager for any sign of encouraging news. Chris Megerian, Chicago Tribune, 7 Apr. 2025 So any surprise is going to set off that hair trigger that he's been trying to cover up instead of working on being slower to anger. Maureen Lee Lenker, EW.com, 6 Nov. 2024 See All Example Sentences for hair-trigger

Word History

First Known Use

Adjective

1834, in the meaning defined at sense 1

Noun

1802, in the meaning defined above

Time Traveler
The first known use of hair-trigger was in 1802

Browse Nearby Words

See all Nearby Words

Cite this Entry

“Hair-trigger.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hair-trigger. Accessed 6 Jun. 2025.

Kids Definition

hair-trigger

adjective
hair-trig·​ger
-ˌtrig-ər
: immediately responsive : quick entry 1 sense 2c
a hair-trigger temper
Etymology

Adjective

from hair trigger, a trigger adjusted so as to permit a firearm to be fired with very slight pressure

More from Merriam-Webster on hair-trigger

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!