Norma is a tragedia lirica or opera in two acts by Vincenzo Bellini with libretto by Felice Romani after the play Norma, ou L'infanticide by Alexandre Soumet. It was first produced at La Scala in Milan on 26 December 1831.

Opera is a form of theatre in which music is a fundamental component and dramatic roles are taken by singers. Such a "work" is typically a collaboration between a composer and a librettist and incorporates a number of the performing arts, such as acting, scenery, costume, and sometimes dance or ballet. The performance is typically given in an opera house, accompanied by an orchestra or smaller musical ensemble, which since the early 19th century has been led by a conductor. Although musical theatre is closely related to opera, the two are considered to be distinct from one another.