An ovation is a big round of applause or cheering from an audience. You might see this happen at a concert, play, or even a sports game when someone does something amazing.
When people give an ovation, they're showing their appreciation and admiration for what's happening on stage or in the arena. It can be for a singer who just hit a high note, an actor who gave an incredible performance, or even a team that won a big game. The audience might get up from their seats, clap loudly, and sometimes even stand on their chairs to show how much they love what's happening. Sometimes you'll hear people shouting "Bravo!" or "Encore!" which means "more" in French, as if begging for more of the amazing performance.
A victory ceremony of less importance than a triumph.
To give (someone) an ovation (prolonged enthusiastic applause).
