OPERA

[noun] - (an example of) formal plays in which all or most of the words are sung to musicWhat's your favourite opera? [C]I don't like opera very much. [U]He goes to the opera (= to see an opera) whenever he can. [U]Maria Callas was a famous opera singer.Compare operetta.Opera glasses are small binoculars which can be used in large theatres by people sitting far from the stage, so that they can see the performers more clearly.An opera house is a theatre which is specially designed for operas to be performed in.The Royal Opera House, Covent Garden