definitions for libretto
opera
overture
Libretto: A libretto is a text or script that accompanies an opera, cantata, or musical. It typically contains the lyrics (or libretto) that the performers sing and speak during the performance. The libretto is written in the form of a dramatic or poetic script, often with stage directions and dialogue, and provides the storyline and character development for the opera.
Opera: Opera is a form of theater that combines music, vocals, acting, and visual elements to tell a story. It typically involves a full orchestra and a cast of singers, who perform their roles with the help of a libretto. Operas are usually grand in scale, featuring elaborate costumes, sets, and staging. The music in opera can range from recitatives and arias, to choruses and ensembles, and the performances are often accompanied by subtitles to help the audience understand the lyrics.
Overture: An overture is an instrumental piece of music that serves as an introduction to an opera, ballet, or other large-scale musical work. It is usually played at the beginning of the performance and provides a preview of the musical themes and motifs that will be heard throughout the work. Overtures are typically structured in a sonata form, and they often feature a condensed version of the melodies and musical ideas from the main composition.