/ Dictionary / Index R RONA: Meaning and Definition of Find definitions for: RONA Pronunciation: [key] return on net assets. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Romus Ronald Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language