broker UK /ˈbɹəʊkə/US /ˈbɹoʊkɚ/noun 4verb 2forms 3 noun4 •A mediator between a buyer and seller. •A stockbroker. •A mediator in general, one who liaises between two or more parties to attempt to achieve an outcome of some kind.The peace plan was representative of Benedict's inability to appear as a neutral broker of peace — 2014 •An agent involved in the exchange of messages or transactions. verb2 •To act as a broker; to mediate in a sale or transaction. •To act as a broker in; to bring about through brokering or negotiation; to arrange or negotiate.In Armando Iannucci’s sitcom The Thick of It, government spin doctor Malcolm Tucker brokers a peace with his opposition counterpart. — 2018 formsbrokered · brokering · brokers