'automatic' definitions:

Definition of 'automatic'

(from WordNet)
adjective
Operating with minimal human intervention; independent of external control; "automatic transmission"; "a budget deficit that caused automatic spending cuts" [ant: manual]
adjective
Resembling the unthinking functioning of a machine; "an automatic `thank you'"; "machinelike efficiency" [syn: automatic, automatonlike, machinelike, robotlike, robotic]
adjective
Without volition or conscious control; "the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive" [syn: automatic, reflex(a), reflexive]
noun
Light machine gun [syn: automatic rifle, automatic, machine rifle]
noun
A pistol that will keep firing until the ammunition is gone or the trigger is released [syn: automatic pistol, automatic]

Definition of 'automatic'

From: GCIDE
  • Colt pistol \Colt pistol\ (Firearms) A self-loading or semi-automatic pistol with removable magazine in the handle holding seven cartridges. The recoil extracts and ejects the empty cartridge case, and reloads ready for another shot. Called also Browning pistol, Colt-Browning pistol, automatic pistol and automatic. [Webster 1913 Suppl. +PJC]

Synonyms of 'automatic'

From: Moby Thesaurus