The definition of auto is an abbreviation for automobile which is a machine with an engine, four wheels, and room for passengers that is used to transport people on land.
A car is an example of an auto.
An automobile is called an auto.
auto definition by Webster's New World
noun pl. autos
intransitive verb autoed, autoing
to go by automobile: an earlier usage
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- of or for oneself; self: autobiography
- by oneself or itself: automobile
- automatic: autofocus
Origin: ; from Classical Greek autos, self
auto definition by American Heritage Dictionary
noun pl. au·tos
An automobile. intransitive verb au·toed
To go by or ride in an automobile.
Origin: Short for automobile.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
or aut- prefix
- Self; same: autogamy.
- Automatic: autopilot.
Origin: Greek, from autos, self.
auto - Computer Definition
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(AUTOmatic) Refers to a wide variety of devices that perform unattended operations.
auto - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
or aut- prefix
Self; same: autogamy.
auto - Science Definition
A prefix meaning “oneself,” as in autoimmune, producing antibodies or immunity against oneself. It also means “by itself, automatic,” as in autonomic, governing by itself.