ˈæktɪˌveɪt ˈæktʃu.eɪt ˈæktʃu.eɪt ɪnˈdʌkʃən ɪ.nɪ.ʃi.ˈeɪ.ʃən ˈtɹɪɡə ˈtɹɪɡɚ ˈtɹɪɡə ˈtɹɪɡɚ tɹɪp

an act that sets in motion some course of events release or pull the trigger on Trigger a gun put in motion or move to act trigger a reaction actuate the circuits lever that activates the firing mechanism of a gun a device that activates or releases or causes something to happen