com·mis·sion·er /kəˈmɪʃ(ə)nɚ/
 委員,理事,行政長官
 Com·mis·sion·er n.
 1. A person who has a commission or warrant to perform some office, or execute some business, for the government, corporation, or person employing him; as, a commissioner to take affidavits or to adjust claims.
    To another address which requested that a commission might be sent to examine into the state of things in Ireland, William returned a gracious answer, and desired the Commons to name the commissioners.   --Macaulay.
 2. An officer having charge of some department or bureau of the public service.
    Herbert was first commissioner of the Admiralty.   --Macaulay.
    The commissioner of patents, the commissioner of the land office, the commissioner of Indian affairs, are subordinates of the secretary of the interior.   --Bartlett.
 Commissioner of deeds, an officer having authority to take affidavits, depositions, acknowledgment of deeds, etc., for use in the State by which he is appointed. [U. S.]
 County commissioners, certain administrative officers in some of the States, invested by local laws with various powers in reference to the roads, courthouses, financial matters, etc., of the county. [U. S.]
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 commissioner
      n 1: a government administrator
      2: a member of a commission