jackpotjack·pot /ˈdʒækpɒt-pɑːt/ noun [countableC]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 Lottery
2a 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.