/ Dictionary / Index J jackpot: Meaning and Definition of Find definitions for: jack•pot Pronunciation: ( jak'pot"), [key] — n. the chief prize or the cumulative stakes in a game or contest, as in bingo, a quiz contest, or a slot machine. a pot that accumulates until a player opens the betting with a pair of predetermined denomination, usually jacks or better. an outstanding reward or success. The firm has hit the jackpot with its new line of computers. to achieve a sensational success; have sudden luck:The firm has hit the jackpot with its new line of computers. to win a jackpot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jackpot (Thesaurus) jack post jack rabbit Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language