1. Posting a accepted security on a stock exchange for trading. 2. Certification of an appliance, equipment, or supplies as complying with specific safety and/or other requirements by an independent standards or testing organization. Underwriters’ Laboratory, also known as listing agency, gives such a certification. 3. Sole right to post a property for sale is given by this written contract between a property owner, the principal, and a real estate broker, the agent. The contract authorizes the agent to give stated services to the principal during a stated period. 4. An authorized real estate broker records of a property for lease or sale. 5. Another name for listed property.