1trig·ger 
/ˈtrɪgɚ/ noun
plural trig·gers /ˈtrɪgɚ/ noun [count] 1 : a lever on a gun that you pull to fire the gun
▪ He pulled/squeezed the trigger. ▪ Police officers are trained to not be too quick on the trigger. [=eager to fire a gun] — see picture at gun 2 : something that causes something else to happen — often + for ▪ The faulty wire was the trigger for the explosion.
▪ He pulled/squeezed the trigger. ▪ Police officers are trained to not be too quick on the trigger. [=eager to fire a gun] — see picture at gun
