/ Dictionary / Index C crystal ball: Meaning and Definition of Find definitions for: crys'tal ball' Pronunciation: [key] a ball of clear crystal, glass, or the like, used in crystal gazing. a method or means of predicting the future. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. crystal crystal-clear Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language