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Synonyms

trigger

American  
[trig-er] / ˈtrɪg ər /

noun

  1. a small projecting tongue in a firearm that, when pressed by the finger, actuates the mechanism that discharges the weapon.

  2. a device, as a lever, the pulling or pressing of which releases a catch or spring.

  3. anything, as an act or event, that serves as a stimulus and initiates or precipitates a reaction or series of reactions.

  4. something that evokes the memory of a traumatic experience, setting off an intense negative emotional reaction.

    This issue of the magazine contains accounts of sexual assault, and may be a trigger for some people.

  5. Slang. triggerman.


verb (used with object)

  1. to initiate or precipitate (a chain of events, scientific reaction, psychological process, etc.).

    Their small protest triggered a mass demonstration.

  2. to fire or explode (a gun, missile, etc.) by pulling a trigger or releasing a triggering device.

    He accidentally triggered his rifle.

  3. to set off a negative emotional reaction in (someone), as by evoking the memory of a traumatic experience, repeatedly raising a sensitive issue, etc..

    I missed seeing my mom in the ICU before she died, and imagining her there triggers me every time I see ICU footage on TV.

verb (used without object)

  1. to release a trigger.

  2. to become active; activate.

idioms

  1. quick on the trigger, quick to act or respond; impetuous; alert.

trigger British  
/ ˈtrɪɡə /

noun

  1. a small projecting lever that activates the firing mechanism of a firearm

  2. machinery a device that releases a spring-loaded mechanism or a similar arrangement

  3. any event that sets a course of action in motion

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (usually foll by off) to give rise (to); set off

  2. to fire or set in motion by or as by pulling a trigger

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
trigger More Idioms  

    More idioms and phrases containing trigger

    • quick on the draw (trigger)

Other Word Forms

  • triggered adjective
  • triggerless adjective

Etymology

Origin of trigger

First recorded in 1615–25; earlier tricker, from Dutch trekker, equivalent to trekk(en) “to pull” + -er -er 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For now, markets appear to anticipate that the oil surge will mainly boost inflation rather than trigger recession.

From Barron's

However, it has worked best in the past when it fell below 1.00 because such bearish sentiment typically triggered a Fed Put.

From Barron's

His serious spinal injury was triggered by a fall in 2021, which required emergency surgery to prevent paralysis, his manager Theresa Fortier said in a statement at the time.

From Los Angeles Times

The Justice Department, unable to observe officer type or effort, writes a rule triggering a negative consequence—investigation—for a certain pattern of complaints.

From The Wall Street Journal

Similar attacks triggered fires at Ras Laffan Industrial City in Qatar, bringing energy product screaming to a halt at the largest natural gas hub in the globe.

From Los Angeles Times