Usage examples for opera:

• In the opera of Armide, I have seen him raise into the air nearly one half of the theatre. "Paris As It Was and As It Is" – Francis W. Blagdon

• How Cuzzoni came to be engaged at the opera is not clear. "Handel" – Edward J. Dent

• She had just come in from the opera "The Life of Marie Antoinette, Queen of France" – Charles Duke Yonge

• Three months' hard work over there will get you into grand- opera sure. "What's-His-Name" – George Barr McCutcheon