A name, symbol, or other device used to identify and promote a product or service, especially an officially registered name or symbol that is thereby protected against use by others, A word, symbol, or phrase used to identify a particular company's product and differentiate it from other companies' products, Any proprietary business, product or service name, verb_ To register something as a trademark, To so label a product, transitive verb_ To register (something) as a trademark, To label (a product) with proprietary identification, adjective_ informal distinctive, characteristic, signature