/ Dictionary / Index N nine: Meaning and Definition of Find definitions for: nine Pronunciation: (nīn), [key] — n. a cardinal number, eight plus one. a symbol for this number, as 9 or IX. a set of this many persons or things. a baseball team. a playing card with nine pips. looking one's best; dressed smartly, splendidly, etc.: All the girls were dressed to the nines for the party. the Muses. —adj. amounting to nine in number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nine (Thesaurus) nincompoop nine ball Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language