auto

Multiple Entries:
  auto    auto-  

Concise Oxford English Dictionary © 2008 Oxford University Press:
auto1

▶noun (pl. autos) informal, chiefly N. Amer. a car.

Concise Oxford English Dictionary © 2008 Oxford University Press:
auto2

▶adjective & noun short for automatic.

Concise Oxford English Dictionary © 2008 Oxford University Press:
auto-1 (usu. aut- before a vowel)

▶combining form

• 1 self: autocrat.

• 2 one's own: autograph.

• 3 automatic; spontaneous: autoxidation.

– origin from Gk autos ‘self’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
auto-2

▶combining form relating to cars: autocross.

– origin C19: from automobile.