Clipping of automatic. (of a gearbox / transmission)

(chiefly attributively) An automobile. / A setting for automatic operation. / An automatic gearbox / transmission. / A car with an automatic gearbox / transmission.

(intransitive, dated) To travel by automobile.

(India) An autorickshaw.

(US, Canada) A type of vehicle designed to move on the ground under its own stored power and intended to carry a driver, a small number of additional passengers, and a very limited amount of other load. A car or motorcar.

(intransitive, dated) To travel by automobile.

Self-moving; self-propelled.

The originator or creator of a work, especially of a literary composition. / Someone who writes books for a living. / (obsolete, criminal law) Principal.

(chiefly US, sometimes proscribed) To create a work as its author.

(countable) A self-written biography; the story of one's own life. / (uncountable) Biographies of this kind regarded as a literary genre.