automatic

Capable of operating without external control or intervention.

The automatic clothes washer was a great labor-saving device.

Done out of habit or without conscious thought.

The reaction was automatic: flight!

Absent-minded doodling is a form of automatic art.

Necessary, inevitable, prescribed by logic, law, etc.

Spitting at another player means an automatic red card.

Firing continuously as long as the trigger is pressed until ammunition is exhausted.

Fully automatic weapons cannot be legally owned by private citizens in the US, except in very special circumstances, as by private security companies.

An autoloader; a semi-automatic or self-loading pistol, as opposed to a revolver or other manually actuated handgun, which fires one shot per pull of the trigger; distinct from machine guns.

The US Army adopted John Browning's M1911 pistol as its sidearm, chambered in .45 ACP (Automatic Colt Pistol).

From a little hand-bag he extracted his automatic pistol, which he put upon the mantelpiece.

A car with an automatic transmission; the transmission itself.

I never learned to drive a stick. I can only drive an automatic.

A semi-automatic pistol.

The G-men raiding the speakeasy were equipped with .45 automatics, while the local policemen were carrying revolvers and shotguns.

"I told him that if my automatic was not a spook-stopper, nothin' else would serve."