Automatic definitions

ô'tə-măt'ĭk
The definition of automatic is something that moves or operates without conscious thought or external control.

An example of automatic is a vehicle that shifts gears without the driver's action.

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Acting or operating in a manner essentially independent of external influence or control.

An automatic light switch; a budget deficit that triggered automatic spending cuts.

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Self-regulating.

An automatic washing machine.

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Acting or done without volition or conscious control; involuntary.

Automatic shrinking of the pupils of the eyes in strong light.

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Acting or done as if by machine; mechanical.

An automatic reply to a familiar question.

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Capable of firing continuously until ammunition is exhausted or the trigger is released.

An automatic rifle.

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Semiautomatic.

An automatic pistol.

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An automatic machine or device.
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A transmission or a motor vehicle with an automatic gear-shifting mechanism.
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An automatic firearm.
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A semiautomatic firearm.
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Done without conscious thought or volition, as if mechanically.
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Involuntary or reflex, as some muscle or gland action.
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Of or pertaining to a transmission, specif. an automotive transmission, designed to change gears automatically.
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Moving, operating, etc. by itself; regulating itself.

Automatic machinery.

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Done with automatic equipment.

An automatic landing.

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Using the force of the explosion of a shell to eject the empty cartridge case, place the next cartridge into the breech, and fire it, so that shots continue in rapid succession until the trigger is released.
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An automatic (or, popularly, semiautomatic) firearm.
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Any automatic machine.
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An automotive vehicle having a transmission that changes gears automatically.
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Capable of operating without external control or intervention.

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

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Done out of habit or without conscious thought.

The reaction was automatic: flight!

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(of a firearm such as a machine gun) Firing continuously as long as the trigger is pressed until ammunition is exhausted.
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(computing, of a local variable) Automatically added to and removed from the stack during the course of function calls.
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A car with automatic transmission.

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

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A semi-automatic firearm.
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Origin of automatic

From French automatique, from Ancient Greek αὐτόματον (automaton), neuter of αὐτόματος (automatos, “self-moving, moving of oneself, self-acting, spontaneous”), from αὐτός (autos, “self, myself”) + μέμαα (memaa, “to wish eagerly, strive, yearn, desire”).