/ Dictionary / Index O ondine: Meaning and Definition of Find definitions for: on•dine Pronunciation: (on-dēn', ôn- for 2 also Fr. ôn-dēn'), [key] — n. undine. (cap., italics) a play (1939) by Jean Giraudoux. (cap., italics) a ballet (1958) choreographed by Frederick Ashton, with musical score by Hans W. Henze. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oncornavirus onding Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language