a. The lever pressed by the finger to discharge a firearm.
b. A similar device used to release or activate a mechanism.
2. Something that precipitates a particular event or situation.
3. Electronics A pulse or circuit that initiates the action of another component.
tr.v. trig·gered, trig·ger·ing, trig·gers
1. To set off; initiate: remarks that triggered bitter debates; allergens that trigger asthma attacks.
2. To fire or explode (a weapon or an explosive charge).
[Dutch trekker, from Middle Dutch trecker, from trecken, to pull.]
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