From Longman Dictionary of Contemporary Englishjackpotjack‧pot /ˈdʒækpɒt $ -pɑːt/ noun [countable] WINa large amount of money that you can win in a game that is decided by chance a £50,000 jackpot jackpot winners → hit the jackpot at hit1(25)
Examples from the Corpus
jackpot• Once, they had four out of five numbers for a jackpot and split $ 102.• Mr Hill's huge jackpot cost him just 54p.• The organisers of the pools believe that huge jackpots are their best weapon in fighting the threat posed by a national lottery.• The changes, according to the pools companies, will increase the number of jackpot winners.• Unemployed roadsweeper Mickey Reid hit the jackpot when his £4 Lotto ticket won him £1.8m.• The jackpot is worth $1 million this week.From Longman Business Dictionaryjackpotjack‧pot /ˈdʒækpɒt-pɑːt/ noun [countable]1a large prize you can win in a LOTTERY (=a game of chance in which people buy tickets with numbers on)this week’s £3 million jackpot in the National Lottery2a large amount of profitGeneral Dynamics sees a potential jackpot in these new aircraft.3hit the jackpot if a person or organization hits the jackpot, they make a lot of money, or have a big successDu Pont chemists have hit the jackpot with this new fiber.Origin jackpot (1800-1900) → JACK12 + POT1; from a card game in which a player needs two jacks to begin 