noun (n)

• a stock broker's business; charges a fee to act as intermediary between buyer and seller(noun.group)

  Synonym:
  brokerage firm, securities firm
  

  source: wordnet30
• the business of a broker; charges a fee to arrange a contract between two parties(noun.group)

  source: wordnet30
• place where a broker conducts his business(noun.artifact)

  Synonym:
  brokerage house
  

  source: wordnet30
• The business or employment of a broker.(noun)

  source: webster1913