/ Dictionary / Index O one-eighty: Meaning and Definition of Find definitions for: one-eight•y Pronunciation: (wun'ā'tē), [key] — pl. -eight•ies. a turn or reversal of 180 degrees. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. one-dimensional one-eyed Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language