n. One who commissions.n. A person having or included in a warrant of authority; one who has a commission or warrant from proper authority to perform some office or execute some business for the person, court, or government giving the commission.n. Specifically— In Great Britain, an officer having charge of some department of the public service which is put into commission. See to put in commission, under commission, n.n. A steward or private factor on an estate, who holds a power from his constituent to manage affairs with full authority.n. A commissionaire.n. One of the persons elected to manage the affairs of a police burgh or non-corporate town in Scotland, corresponding to a bailie or town-councilor in a corporate town.n. A betting-broker at a race-track.