trigger

(redirected from triggerless)
Also found in: Dictionary, Thesaurus, Medical.

trigger

Machinery a device that releases a spring-loaded mechanism or a similar arrangement
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

trigger

[′trig·ər]
(computer science)
To execute a jump to the first instruction of a program after the program has been loaded into the computer. Also known as initiate.
(electronics)
To initiate an action, which then continues for a period of time, as by applying a pulse to a trigger circuit.
The pulse used to initiate the action of a trigger circuit.
(ordnance)
A metallic item, part of the firing mechanism of a firearm, designed to release a firing pin by the application of pressure by the finger.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Trigger

Roy Roger’s horse. [TV: “The Roy Rogers Show” in Terrace, II, 260]
See: Horse
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.

trigger

(database)
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].
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

trigger

(1) A mechanism that initiates an action when an event occurs such as reaching a certain time or date or upon receiving some type of input. A trigger generally causes a program routine to be executed.

(2) In a database management system (DBMS), a trigger is an SQL procedure that is executed when a record is added or deleted. It is used to maintain referential integrity in the database. A trigger may also execute a stored procedure. Triggers and stored procedures are built into DBMSs used in client/server environments. See intelligent database.

(3) A condition that initiates the harmful effects of a logic bomb such as many viruses and worms. Many forms of malicious software use particular dates as triggers. Some viruses count the number of infections and trigger their payloads at a specific number.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Mr Kirk's latest brush with the law started when he bought a replica World War I bi-plane which came complete with a decommissioned and triggerless Lewis machine gun.
Hunters often use triggerless back-tension releases during the off-season to fine-tune their form.
Stanislawski[R]'s new Micro III[TM] is a triggerless release available in Deuce[TM] (two finger), Trio[TM] (three finger), Quattro[TM] (four finger), and Smoothie[TM] versions in large and medium hand sizes.