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1. Lever that activates the firing mechanism of a gun
   - gun trigger
    
2. A device that activates, releases or causes something to happen
    
3. An act that sets in motion some course of events
   - induction, initiation

1. Put in motion or move to act
   "trigger a reaction";
   - trip, actuate, activate, set off, spark off, spark, trigger off, touch off
    
2. Release or pull the trigger on
   "Trigger a gun"

Derived forms: triggered, triggers, triggering

Type of: causation, causing, device, initiate, lever, pioneer

Part of: gun

Encyclopedia: Trigger