Breakout describes something or someone that suddenly becomes much more successful or popular than before. A breakout performance might be when an unknown actor delivers such an amazing role that everyone starts talking about them. A band's breakout hit is the song that launches them from playing small clubs to selling out arenas.

The word captures that moment when someone or something breaks through a barrier that was holding them back. Think of a student who has always been quietly good at art suddenly winning a major competition: that's their breakout moment. A video game might be a studio's breakout success, meaning it performed far better than their previous games and put them on the map.

You can also use breakout as a noun to describe escaping from confinement, like a breakout from prison or when your dog makes a breakout from the backyard. In medicine, a breakout of pimples or a rash means a sudden appearance on your skin.

The core idea connects all these meanings: something confined or hidden suddenly bursts into the open where everyone can see it.