S: (n) automatic pistol, automatic (a pistol that will keep firing until the ammunition is gone or the trigger is released)
Adjective
S: (adj) automatic (operating with minimal human intervention; independent of external control) "automatic transmission"; "a budget deficit that caused automatic spending cuts"
S: (adj) automatic, reflex, reflexive (without volition or conscious control) "the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive"