Blowout/ˈbləʊaʊt/ Definition 1 of 5Pro Tip 1/2Party Scale The term often implies a larger, more elaborate party. Our school's prom is a blowout that everyone looks forward to. Pro Tip 2/2Positive Vibe Using 'blowout' for a party suggests an enjoyable and exciting time. The annual company blowout was a night to remember.