Emily Dickinson Lexicon

TRIG'GER, n. [W. trigaw, to stop; Dan. trekker, to draw; trykker, to press or pinch; or trygger, to make sure; trug, Sw. trygg, safe, secure; trycka, to press. This is the Eng. true, or from the same root.]

1. A catch to hold the wheel of a carriage on a declivity.
2. The catch of a musket or pistol; the part which being pulled, looses the lock for striking fire.