an agent who buys or sells for a principal on a commission basis without having title to the property.

a person who functions as an intermediary between two or more parties in negotiating agreements, bargains, or the like.

stockbroker.

to act as a broker for

to broker the sale of a house.

to act as a broker.

noun

agent , business person , dealer , entrepreneur , factor , financier , go-between , interagent , interceder , intercessor , intermediary , intermediate , mediator , merchant , middleperson , negotiator , stockbroker , intermediator , middleman , broacher , jobber , marriage , realtor , scalper , stock