banker
    n 1: a financier who owns or is an executive in a bank
    2: the person in charge of the bank in a gambling game

Banker \Bank"er\ (b[a^][ng]k"[~e]r), n.[See the nouns Bank and
   the verbs derived from them.]
   1. One who conducts the business of banking; one who,
      individually, or as a member of a company, keeps an
      establishment for the deposit or loan of money, or for
      traffic in money, bills of exchange, etc.
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   2. A money changer. [Obs.]
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   3. The dealer, or one who keeps the bank in a gambling house.
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   4. A vessel employed in the cod fishery on the banks of
      Newfoundland. --Crabb. --J. Q. Adams.
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   5. A ditcher; a drain digger. [Prov. Eng.]
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   6. The stone bench on which masons cut or square their work.
      --Weale.
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BANKER, com. law. A banker is one engaged in the business of receiving other 
persons money in deposit, to be returned on demand discounting other 
persons' notes, and issuing his own for circulation. One who performs the 
business usually transacted by a bank. Private bankers are generally not 
permitted. 
     2. The business of bankers is generally performed through the medium of 
incorporated banks. 
     3. A banker may be declared a bankrupt by adverse proceedings against 
him. Act of Congress of 19th Aug. 1841. See 1  Atk. 218; 2 H. Bl. 235; 1 
Mont. B. L. 12. 
     4. Among the ancient Romans there were bankers called argentarii, whose 
office was to keep registers of contracts between individuals, either to 
loan money, or in relation to sales and stipulations. These bankers 
frequently agreed with the creditor to pay him the debt due to him by the 
debtor. Calvini Lex. Jurid.