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3 definitions found
 for trigger
From The Collaborative International Dictionary of English v.0.48 :

  Trigger \Trig"ger\, n. [For older tricker, from D. trekker, fr.
     trekken to draw, pull. See Trick, n.]
     1. A catch to hold the wheel of a carriage on a declivity.
        [1913 Webster]
     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.
        [1913 Webster]
     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.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

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

From The Free On-line Dictionary of Computing (30 December 2018) :

      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].

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