# Trigger

Trigger may refer to:

## Notable animals and people
### Animal

* Trigger (horse), owned by cowboy star Roy Rogers

### Nickname

* Trigger Alpert (1916–2013), American jazz bassist
* "Trigger Mike" Coppola (1900–1966), American gangster

### Surname

* Bruce Trigger (1937–2006), Canadian archaeologist
* Damon Trigger (born 1972), New Zealand born former English cricketer
* Hannah Trigger (born 1987), Australian snowboarder
* Ian Trigger (1938–2010), British actor

## Technology

* Trigger (firearms), a mechanism that actuates the firing of firearms
* Database trigger, procedural code that is automatically executed in response to certain events
* Dead man's trigger, a safety device that activates safeguards if the operator is incapacitated
* Flip-flop (electronics), called a trigger circuit by IBM
* Image trigger, a device used in high speed cameras
* Schmitt trigger, an electronic circuit

## Art, entertainment, and media
### Fictional entities

* Trigger (Only Fools and Horses), a BBC sitcom character played by Roger Lloyd-Pack
* Trigger Argee, a fictional character in a series of science fiction short stories by James H. Schmitz
* Devil Trigger, a transformation ability found in the Devil May Cry series
* Trigger, a fictional horse in "Ernie (The Fastest Milkman in the West)"
* Trigger, the main player character in Ace Combat 7: Skies Unknown
* Trigger, the version of Popeye in the film The Story of Temple Drake (1933), a film adaptation of the William Faulkner novel Sanctuary

### Film and television

* Trigger (2010 film), a Canadian film
* Trigger, Jr. (1950), a 1950 American film starring Roy Rogers
* "Triggers" (Supergirl), an episode of Supergirl
* Ultraman Trigger, a 2021 Japanese tokusatsu television series
* Trigger (2022 film), an Indoan Tamil-language action film

### Literature

* The Trigger, a 1999 science fiction novel by Arthur C. Clarke and Michael P. Kube-McDowell
* Triggers (novel), a 2012 science fiction novel by Robert J. Sawyer

### Music

* The Trigger (band), a Serbian hard rock/heavy metal band

#### Albums and EPs

* Trigger (EP), a 2003 EP by In Flames
* Trigger (album), a 2010 album by Porno Graffitti
* Trigger, an album by Jacob Quistgaard
* Trigger, an album by Soulside
* Trigger, an album by The Law

#### Instruments

* Trigger (drums), a transducer that allows a drum to control an electronic device
* Trigger (guitar), the Martin N-20 guitar played by Willie Nelson
* Trigger (trombone), a switch that enables a trombonist to switch from one set of tubing to another
* Trigger pad, a device used in electronic percussion

#### Songs

* "Trigger" (song), a 2019 song by Major Lazer and Khalid
* "Trigger", by Anne-Marie from Speak Your Mind
* "Trigger", by Converge from The Dusk in Us
* "Trigger", by In Flames from Reroute to Remain and its eponymous EP
* "Triggers", by Royal Blood from Back to the Water Below
* "Trigger", by Marcel Woods and W&W

## Ships

* USS Trigger (SS-237), a submarine (laid down 1941, sunk 1945)
* USS Trigger (SS-564), a submarine (laid down 1949, decommissioned 1973)

## Science

* Trigger (particle physics), hardware or software based device for the (online-)selection of specific event classes from large datasets
* Trigger, one event that makes a slope failure in landslides, in the causes of landslides
* Environmental trigger, a factor caused (or aided) by the environment
* ATLAS trigger system, in the ATLAS experiment

### Biology

* Hibernation induction trigger, a blood substance that induces hibernation
* Seizure trigger, a factor that can cause a seizure
* Spawning triggers, environmental cues that cause fish to breed

## Other uses

* Studio Trigger, a Japanese animation studio founded by Hiroyuki Imaishi
* Trigger, a verb conjugation specifying the subject's role in languages with Austronesian alignment
* Casus belli, an event triggering a war
* Trauma trigger, an event causing traumatic memories or feelings to resurface
* Trigger (game controller), a button on some game controllers