/ Dictionary / Index A addio*: Meaning and Definition of Find definitions for: ad•di•o Pronunciation: (äd-dē'ô), [key] — interj. Italian. good-bye. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Addington Addis Ababa Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language