Added 9 October 2026 roi noun Categories: TimeRare Words noun ! Definition from WordNet 3.1, Princeton University. More about roi at Wordnik → Where our words come from → (corporate finance) the amount, expressed as a percentage, that is earned on a company's total capital calculated by dividing the total capital into earnings before interest, taxes, or dividends are paid. Related Words: ihricrrciisrdirirsprofitaffordabilityinvestmentmepprofitabilityprofitable Back to today's word