- The definition of a trigger is the mechanism on a gun that makes it shoot a bullet or anything that starts a series of events.
- An example of trigger is what a cop presses to fire his gun.
- An example of trigger is a hostile confrontation that causes a series of bad memories with the person.
- Trigger is defined as to fire a gun or to start a series of events or emotions.
- An example of trigger is to shoot a rifle while hunting.
- An example of trigger is to start crying at a movie, thereby causing many other people in the theater to begin weeping.
trigger definition by Webster's New World
- a small lever or part which when pulled or pressed releases a catch, spring, etc.
- in firearms, a small lever pressed back by the finger to activate the firing mechanism
- an act, impulse, etc. that initiates an action, series of events, etc.
Origin: earlier tricker ; from Dutch trekker ; from trekken, to draw, pull: see trek
- to fire or activate by pulling or pressing a trigger
- to initiate (an action); set off: the fight that triggered the riot
trigger definition by American Heritage Dictionary
- a. The lever pressed by the finger to discharge a firearm.b. A similar device used to release or activate a mechanism.
- An event that precipitates other events.
- Electronics A pulse or circuit that initiates the action of another component.
- To set off; initiate: remarks that triggered bitter debates.
- To fire or explode (a weapon or an explosive charge).
Origin: Dutch trekker, from Middle Dutch trecker, from trecken, to pull.
trigger - Computer Definition
Procedural code automatically executed in response to certain events on a particular table in a database. Triggers can restrict access to specific data, perform logging, or audit access to data. Triggers can be either “row triggers” or “statement triggers.” The former define an action for every row of a table, whereas the latter occur only once and are not dependent on the shape of the data. Moreover, there are BEFORE and AFTER triggers, which alter the time of execution of the trigger. Also, an INSTEAD OF trigger, a conditional trigger, will fire instead of the triggering statement. There are typically three triggering events that cause trigger to fire: INSERT (as a new record is being inserted into the database); UPDATE (as a record is being changed); and DELETE (as a record is being deleted). Databases that support triggers typically give programmers access to record variables by means of a syntax such as OLD.cust_name or NEW.cust_name.
The term trigger is also used to describe an event that has to occur to activate a virus. These events can either be time based or condition based, meaning that one event must occur before the virus is activated. An example is the opening of a file or an email attachment. Other triggers can be activated over the network to coordinate a distributed attack, in which a number of hosts are infected with a virus and need to be activated at the same time to take down a target.
GNU Free Documentation License. Database Trigger. GNU Website. http://en.wikipedia.org/wiki/Database_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.
trigger - Phrases/Idioms
quick on the triggerâ Informal
- quick to fire a gun
- quick to act, understand, retort, etc.; alert