Broker has several meanings in different situations. Most Realtors are "agents" who work under a "broker." Some agents are brokers as well, either working for themselves or under another broker. In the mortgage industry, broker usually refers to a company or individual that does not lend the money for the loans themselves, but brokers loans to larger lenders or investors. As a normal definition, a broker is anyone who acts as an agent, bringing two parties together for any type of transaction and earns a fee for doing so.