librettos

Noun

libretto (plural librettos or libretti)

1. The text of a dramatic musical work, such as an opera.
   • From Mozart's letters we know that the composer decided to enlarge the part of Osmin, the harem keeper, because the originator of the part, Ludwig Fischer, had a freakishly low bass voice that Mozart wanted to exploit. Osmin's principal arias and ensembles were duly lengthened beyond what appeared...2002 January 3, Richard Traubner, “Mozart's Singspiel”, in Playbill
2. A book containing such a text.

See all 3 meanings of libretto