A large cash prize in a lottery or gambling game, often one that accumulates over time until it is won.
"He won the jackpot on a scratch-off ticket."
An unexpected or sudden piece of great luck or a highly successful outcome.
"Landing that executive role was a real jackpot for her career."
To win a large sum of money or achieve a great success through luck.
"She jackpotted her savings with a single lucky bet."