/ Dictionary / Index R Rizzio: Meaning and Definition of Find definitions for: Riz•zio Pronunciation: (rit'sē-ō", rēt'-It.rēt'tsyô), [key] 1533?–66, Italian musician: private foreign secretary to Mary, Queen of Scots 1564–66. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rizzar RJ Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language