| trigger | | |
| n. (artifact) | 1. gun trigger, trigger | lever that activates the firing mechanism of a gun. |
| ~ gun | a weapon that discharges a missile at high velocity (especially from a metal tube or barrel). |
| ~ hair trigger | a gun trigger that responds with little pressure. |
| ~ lever | a rigid bar pivoted about a fulcrum. |
| n. (artifact) | 2. trigger | a device that activates or releases or causes something to happen. |
| ~ device | an instrumentality invented for a particular purpose.; "the device is small enough to wear on your wrist"; "a device intended to conserve water" |
| ~ plutonium pit, plutonium trigger | a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives. |
| n. (act) | 3. induction, initiation, trigger | an act that sets in motion some course of events. |
| ~ causation, causing | the act of causing something to happen. |
| ~ instigation, fomentation | deliberate and intentional triggering (of trouble or discord). |
| v. (creation) | 4. activate, actuate, set off, spark, spark off, touch off, trigger, trigger off, trip | put in motion or move to act.; "trigger a reaction"; "actuate the circuits" |
| ~ come about, hap, happen, occur, take place, go on, fall out, pass off, pass | come to pass.; "What is happening?"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important" |
| ~ initiate, pioneer | take the lead or initiative in; participate in the development of.; "This South African surgeon pioneered heart transplants" |
| v. (competition) | 5. trigger | release or pull the trigger on.; "Trigger a gun" |
| ~ fire, discharge | cause to go off.; "fire a gun"; "fire a bullet" |
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