To initiate something.
To fire a weapon.
To spark a response, especially a negative emotional response, in (someone).
To activate; to become active.
An electronic transducer allowing a drum, cymbal, etc. to control an electronic drum unit or similar device.
An event, experience or other stimulus that initiates a traumatic memory or a strong reaction in a person.
An SQL procedure that may be initiated when a record is inserted, updated or deleted; typically used to maintain referential integrity.
A concept or image that upsets somebody by sparking a negative emotional response.
A similar device used to activate any mechanism.
An event that initiates others, or incites a response.
A pulse in an electronic circuit that initiates some component.
A text string that, when received by a player, will cause the player to execute a certain command.
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 finger-operated lever used to fire a gun.
To aim at.
To depend upon; to pivot around, to have as a central subject.
To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.).
To fill with enthusiasm; to intoxicate, give pleasure to ( + to an object of interest or excitement).
To start operating; to power up, to become on.
To take drugs.
To cause to take up drugs, especially hallucinogens.
To set a flow of fluid or gas running by rotating a tap or valve.
To violently rebel against; to suddenly attack.
To sexually arouse.