automatic: Meaning and Definition of

au•to•mat•ic

1. having the capability of starting, operating, moving, etc., independently: an automatic sprinkler system; an automatic car wash.
2. occurring independently of volition, as certain muscular actions; involuntary.
3. done unconsciously or from force of habit; mechanical: an automatic application of the brakes.
4. occurring spontaneously: automatic enthusiasm.
5. (of a firearm, pistol, etc.) utilizing the recoil or part of the force of the explosive to eject the spent cartridge shell, introduce a new cartridge, cock the arm, and fire it repeatedly.

1. a machine that operates automatically.
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4. audible (def. 2).
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7. an automobile equipped with automatic transmission.
8. being operated or controlled by or as if by an automatic device.