[n] an act that sets in motion some course of events
[n] lever that activates the firing mechanism of a gun
[v] release or pull the trigger on; "Trigger a gun"
[v] put in motion or move to act; "trigger a reaction"; "actuate the circuits"
Synonyms
activate, actuate, gun trigger, induction, initiation, set off, spark, spark off, touch off, trigger off, trip