automatic

(noun) light machine gun. Synonyms: automatic rifle, machine rifle.

(noun) a pistol that will keep firing until the ammunition is gone or the trigger is released. Synonyms: automatic pistol.

(adj) operating with minimal human intervention; independent of external control. Synonyms: automatic (vs. manual). Examples: "Automatic transmission." "A budget deficit that caused automatic spending cuts."

(adj) resembling the unthinking functioning of a machine. Synonyms: automatonlike, machinelike, robotlike, robotic. Examples: "An automatic `thank you'." "Machinelike efficiency."

(adj) without volition or conscious control. Synonyms: reflex(prenominal), reflexive. Examples: "The automatic shrinking of the pupils of the eye in strong light." "A reflex knee jerk." "Sneezing is reflexive."