Act (opera) (Fr. acte; Ger. Aufzug; It. atto)
- Julian Budden
A self-contained section of an opera or music drama marked off by an interval (normally with applause and curtain-calls for the artists). It may last anything between 15–20 minutes (Act 3 of La bohème, 1896) and more than two hours (Act 1 of Götterdämmerung...