/ Dictionary / Index A auto: Meaning and Definition of Find definitions for: au•to Pronunciation: (ô'tō), [key] — pl. -tos. automobile. auto- Pronunciation: [key] a combining form meaning “self,” “same,” “spontaneous,” used in the formation of compound words: autograph. auto- Pronunciation: [key] a combining form representingin compound words: autocade. auto- Pronunciation: [key] a combining form representingin compound words:Sometimes also taken as an adjective: autoalarm; autofeed; autofocus. auto. Pronunciation: [key] automatic. automobile. automotive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: auto (Thesaurus) autism autoanalysis Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language