Jackpot/ˈdʒækpɑːt/ Definition 1 of 3Pro Tip 1/3Lucky Win Refers to a surprise monetary gain, often with a low chance of occurrence. I can't believe I hit the jackpot on that slot machine! Pro Tip 2/3Figurative Use Used metaphorically to describe any large success or good fortune. Getting that job felt like winning the jackpot. Pro Tip 3/3Colloquial Excitement Often conveys excitement or enthusiasm when used in everyday conversation. Finding this rare book at a garage sale was a real jackpot!