trigger

1 trigger /ˈtrɪgɚ/ noun
plural triggers
1 trigger
/ˈtrɪgɚ/
noun
plural triggers
Britannica Dictionary definition of TRIGGER
[count]
1 
: a lever on a gun that you pull to fire the gun
— see picture at gun
2 
: something that causes something else to happen — often + for
2 trigger /ˈtrɪgɚ/ verb
triggers; triggered; triggering
2 trigger
/ˈtrɪgɚ/
verb
triggers; triggered; triggering
Britannica Dictionary definition of TRIGGER
[+ object]
1 
a  : to cause (something, such as an alarm) to start functioning
b  : to cause (a bomb) to explode
2 
: to cause (something) to start or happen