What is the meaning of Trigger?

A finger-operated lever used to fire a gun.

A similar device used to activate any mechanism.

An event that initiates others, or incites a response.

A concept or image that upsets somebody by sparking a negative emotional response.

An event, experience or other stimulus that initiates a traumatic memory or a strong reaction in a person.

An electronic transducer allowing a drum, cymbal, etc. to control an electronic drum unit or similar device.

A device that manually lengthens (or sometimes shortens) the slide or tubing of a brass instrument, allowing the pitch range to be altered while playing.

A pulse in an electronic circuit that initiates some component.

An SQL procedure that may be initiated when a record is inserted, updated or deleted; typically used to maintain referential integrity.

A text string that, when received by a player, will cause the player to execute a certain command.

A catch to hold the wheel of a carriage on a declivity.

To fire (a weapon).

To cause, to precipitate, to bring (something) about in response or as a result.

To spark a response, especially a negative emotional response, in (a person).

To activate; to become active.

comparative form of trig: more trig

trigger

Source: wiktionary.org