Definitions

1. adjective

operating or able to operate automatically, often by means of a mechanical, electronic, or computer system.

“The car’s automatic transmission made it easy to drive on the highway.”

2. noun

a system or device that performs a function automatically.

“The automatic door opened with a gentle touch of the handle.”

3. noun

a machine or device that performs a function automatically, especially one that is controlled by a computer.

“The automatic teller machine allowed me to withdraw cash after hours.”