Are both A Midsummer Night's Dream and La sonnambula operas?
La sonnambula La sonnambula ("The Sleepwalker") is an opera semiseria in two acts, with music in the "bel canto" tradition by Vincenzo Bellini set to an Italian libretto by Felice Romani, based on a scenario for a "ballet-pantomime" written by Eugène Scribe and choreographed by Jean-Pierre Aumer called "La somnambule, ou L'arrivée d'un nouveau seigneur". The ballet had premiered in Paris in September 1827 at the height of a fashion for stage works incorporating somnambulism.
Melodramma Melodramma (plural: "melodrammi") is a 17th-century Italian term for a text to be set as an opera, or the opera itself. In the 19th-century, it was used in a much narrower sense by English writers to discuss developments in the early Italian libretto, e.g., "Rigoletto" and "Un ballo in maschera". Characteristic are the influence of French bourgeois drama, female instead of male protagonists, and the practice of opening the action with a chorus.