The source of, or reason for, an event or action; that which produces or effects a result.
Sufficient reason for a state, as of emotion.
A goal, aim or principle, especially one which transcends purely selfish ends.
A suit or action in court; any legal process by which a party endeavors to obtain his claim, or what he regards as his right; case; ground of action.
To actively produce as a result, by means of force or authority.
To set off an event or action.
An event that initiates others, or incites a response.
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.
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 fire a weapon.
To initiate something.
To spark a response, especially a negative emotional response, in (someone).
To activate; to become active.