/ Dictionary / Index D duello: Meaning and Definition of Find definitions for: du•el•lo Pronunciation: (d-el'ō, dy-It.d-el'lô), [key] — n. the practice or art of dueling. the code of rules regulating dueling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duelist duende* Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language