Okay kiddo, so do you know what an opera is? It's like a really fancy musical where people sing instead of talking.
Now, a revolutionary opera is a special kind of opera that usually tells a story about a revolution – you know, like when people get really upset and decide they don't want to follow the government anymore, so they try to change things.
In these operas, the characters often sing about their struggles and how they are fighting for a better world. They might talk about wanting freedom or justice, and sometimes they even sing songs that inspire people to join the revolution too.
Revolutionary operas were really popular in certain countries, especially during times when people were rebelling against their government. They were a way for people to express their frustrations and hopes for a better future, and they could also be a form of propaganda to encourage others to join the cause.
So that's basically what a revolutionary opera is, kiddo. It's like a musical that tells a story about a rebellion, and it often has songs that inspire people to fight for change. Pretty cool, huh?