middleman

/ˈmɪdl ˌmæn/
noun
  1. A person or company that acts as a link between producers and consumers, often buying goods from producers and selling them to retailers or customers.
    • The middleman took a commission for arranging the deal between the artist and the gallery.
    • The farmer sold his apples to a middleman, who then distributed them to grocery stores.
    • By cutting out the middleman, the online store offers lower prices directly to customers.
  2. A person who helps two sides communicate or negotiate, especially in a dispute or business deal.
    • The diplomat acted as a middleman between the warring factions.
    • In many cultures, a middleman is used to negotiate marriage arrangements.
    • A trusted middleman helped the two companies reach a fair agreement.