LIBRETTO Meaning of LIBRETTO in English [ lɪ'brɛtəʊ ]■ noun ( plural libretti -ti or ~s ) the text of an opera or other long vocal work.Derivativeslibrettist noun OriginC18: from Ital., dimin. of libro 'book'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004