1. Acceptance of a qualifying security for trading over a stock exchange. 2. Certification of an appliance, equipment, or supplies by an independent standards or testing organisation (such as Underwriters' Laboratory, called listing agency) as complying with specific safety and/or other requirements. 3. Written contract between a property owner (the principal) and a real estate broker (the agent) authorising him or her to perform specified services for the principal within a specified period. 4. Record of a property for lease or sale by an authorised real estate broker. 5. Alternative term for listed property.