Recitative is a style of delivery in which a singer is allowed to adopt the rhythms and delivery of ordinary speech. Recitative does not repeat lines as formally composed songs do. It resembles sung ordinary speech more than a formal musical composition.
This score for Handel's Lascia ch'io pianga shows the simple accompaniment for a recitative; much of the time, the basso continuo (the lower staff in bass clef) play half notes and whole notes underneath the vocalist's recitative part.
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.
Macbeth at the Savonlinna Opera Festival in St. Olaf's Castle, Savonlinna, Finland, in 2007
La Scala of Milan
Palais Garnier of the Paris Opéra
Berlin State Opera