/ Dictionary / Index L libretto: Meaning and Definition of Find definitions for: li•bret•to Pronunciation: (li-bret'ō), [key] — pl. -bret•tos, -bret•ti the text or words of an opera or similar extended musical composition. a book or booklet containing such a text. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: libretto (Thesaurus) librettist Libreville Related Content Daily Word Quiz: prevalent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language