noun

1. An automobile.

   “My brother is an auto mechanic.”

2. A setting for automatic operation.

   “Put it on auto.”

3. An automatic gearbox / transmission.

   “A body coloured centre pillar signalled the arrival of an electronic four-speed auto, slight suspension revisions and minor trim changes.”

Synonyms: automobile, car, motor, motorcar, automatic

verb

1. To travel by automobile.

adjective

1. Capable of operating without external control or intervention.

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

2. Done out of habit or without conscious thought.

   “Absent-minded doodling is a form of automatic art.”

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

   “Spitting at another player means an automatic red card.”

Synonyms: instinctive, perfunctory, thoughtless