Opera (noun)

1. A dramatic work, typically in three or four acts, that is performed in an opera house and usually includes music, singing, and dancing.
2. A building or room used for the performance of operas.

Origin:

Mid 16th century: from italian, literally "work, labor", from latin opera.

Examples:

1. The opera was performed in Italian.
2. She loved going to the opera.
3. The Metropolitan Opera is one of the most famous opera houses in the world.
4. The opera was a huge success.
5. The opera singer's voice filled the theater.