The fee or commission charged by a broker for arranging a business transaction; the business of a broker.
From Middle English 'brokage', from 'broker' + -age suffix. 'Broker' originally meant a wine merchant who broke open barrels to sell wine in smaller quantities.
Medieval brokers literally 'broke' open sealed containers to sell portions—so a 'broken' deal led to the word 'broker,' and that's where 'brokerage' fees come from.
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