SME Love Machine 16 years ago SME Small and midsized enterprises. Companies that are below a certain size in terms of revenue or the number of employees. The size limits vary from one country to another. Random Finance Terms for the Letter S Slippage Small-Firm Effect Small Issues Exemption SME Smithsonian Agreement Social Security Act Society for Worldwide Interbank Financial Telecommunications Soft Capital Rationing Soft Currency Recommended for you: Smithsonian Agreement Soft Capital Rationing Society for Worldwide Interbank Financial Telecommunications (SWIFT) Social Security Act