Trigger

n.	1.	A catch to hold the wheel of a carriage on a declivity.
	2.	(Mech.) A piece, as a lever, which is connected with a catch or detent as a means of releasing it; especially (Firearms), the part of a lock which is moved by the finger to release the cock and discharge the piece. Trigger fish (Zool.) a large plectognath fish (Balistes Carolinensis or Balistes capriscus) common on the southern coast of the United States, and valued as a food fish in some localities. Its rough skin is used for scouring and polishing in the place of sandpaper. Called also leather jacket, and turbot.

Noun	1.	trigger - lever that activates the firing mechanism of a gun Synonyms: gun trigger
	2.	trigger - a device that activates or releases or causes something to happen
	3.	trigger - an act that sets in motion some course of events Synonyms: initiation, induction
Verb	1.	trigger - put in motion or move to act; "trigger a reaction"; "actuate the circuits" Synonyms: activate, actuate, set off, spark, spark off, touch off, trigger off, trip
	2.	trigger - release or pull the trigger on; "Trigger a gun"

(database)

trigger - An action causing the automatic invocation of a procedure, for instance to preserve referential integrity. A triggers goes into effect when a user attempts to modify data with an insert, delete, or update command. A trigger can instruct the system to take any number of actions when a specified change is attempted. By preventing incorrect, unauthorized, or inconsistent changes to data, triggers help maintain the integrity of the database. [Sybase SQL Server Release 10.0 Transact-SQL User's Guide].

activate, actuate, come about, fall out, go on, hap, happen, induction, initiate, initiation, occur, pass, pass off, pioneer, set off, spark, spark off, take place, touch off, trigger off, trip

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