automatic Definition

automatic
adj

1. Said of a machine or device: capable of operating on its own by means of a self-regulating mechanism, and requiring little human control once it has been activated.

Thesaurus: self-starting, mechanical, motorized, automated, mechanized, electronic, self-acting, self-regulating, computerized, programmed.
2. Said of an action: done without thinking; unconscious; spontaneous.

Thesaurus: involuntary, mechanical, spontaneous, unthinking, reflex, habitual, unconscious; Antonym: deliberate, willed, premeditated.
3. Happening as a necessary and inevitable result.

Example: The gravity of the offence meant an automatic driving ban
4. Said of a firearm: able to reload itself and so capable of firing continuously. Compare semi-automatic.
5. Said of a motor vehicle: having automatic transmission.

noun

1. An automatic firearm.
2. A vehicle with automatic transmission.
3. A washing machine that operates automatically. Compare twin tub, washer-dryer.

Derivative: automatically
adverb

Etymology: 18c: from Greek automatos acting independently.