/ Dictionary / Index R return on investment: Meaning and Definition of Find definitions for: return' on invest'ment Pronunciation: [key] the amount of profit, before tax and after depreciation, from an investment made, usually expressed as a percentage of the original total cost invested. Abbr.: ROI Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. return on equity return on net assets Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language