auto

[aw-toh]

noun, plural au·tos.

adjective

of or relating to automobiles: an auto salesman; auto detailing.

Origin of auto

An Americanism dating back to 1895–1900; by shortening

auto.

auto-

1

a combining form meaning “self,” “same,” “spontaneous,” used in the formation of compound words: autograph, autodidact.
Also especially before a vowel, aut-.

Origin of auto-

1
< Greek, combining form of autós self

auto-

2

a combining form representing automobile in compound words: autocade.

Origin of auto-

2
see origin at auto

auto-

3

a combining form representing automatic in compound words: autoalarm; autofeed; autofocus. Sometimes also taken as an adjective: auto enlarger; auto stop control; auto dialer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for auto

Contemporary Examples of auto

Historical Examples of auto



British Dictionary definitions for auto

auto

noun plural -tos US and Canadian informal

  1. short for automobile
  2. (as modifier)auto parts
Indian informal short for autorickshaw

auto-

sometimes before a vowel aut-

combining form

self; same; of or by the same oneautobiography
acting from or occurring within; self-causedautohypnosis
self-propelling; automaticautomobile

Word Origin for auto-

from Greek autos self
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for auto
n.

shortened form of automobile, 1899; cf. French auto.

auto-

word-forming element meaning "self, one's own, by oneself," from Greek auto- "self, one's own," combining form of autos "self, same," of unknown origin. Before a vowel, aut-; before an aspirate, auth-. In Greek also used as a prefix to proper names, e.g. automelinna "Melinna herself." The opposite prefix would be allo-.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for auto

auto-

pref.

Self; same:autogamy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for auto

auto-

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.