American English

Definition of libretto noun from the Oxford Advanced American Dictionary

 

libretto

 noun
noun
NAmE//lɪˈbrɛt̮oʊ//
 
(pl. librettos or libretti
NAmE//lɪˈbrɛt̮i//
 
)
(music)
 
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the words that are sung or spoken in an opera or a musical play
See the Oxford Advanced Learner's Dictionary entry: libretto