イタリア語のopera、作曲、構成、オペラ、ラテン語のoperari、仕事、労働、創造、opus、オペラと同じ語源から。
No good opera plot can be sensible. ... People do not sing when they are feeling sensible. [W.H. Auden, 1961]As a branch of dramatic art, it is attested from 1759. First record of opera glass "small binoculars for use at the theater" is from 1738. Soap opera is first recorded 1939, as a disparaging reference to daytime radio dramas sponsored by soap manufacturers.