/ Dictionary / Index N nine ball: Meaning and Definition of Find definitions for: nine' ball" Pronunciation: [key] a variation of pool played with nine numbered object balls that must be pocketed in order by number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nine nine-banded armadillo Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language