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. [ 1913 Webster ]

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. [ 1913 Webster ]

2. An officer having charge of some department or bureau of the public service. [ 1913 Webster ]

Herbert was first commissioner of the Admiralty. Macaulay. [ 1913 Webster ]

The commissioner of patents, the commissioner of the land office, the commissioner of Indian affairs, are subordinates of the secretary of the interior. Bartlett. [ 1913 Webster ]

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. ] [ 1913 Webster ]

n. A missionary; an envoy; one who conducts a mission. See Mission, n., 6. “Like mighty missioner you come.” Dryden. [ 1913 Webster ]