A commissar is a term used to describe an official appointed by a government or other authority to oversee and administer a particular area, organization or group. The word comes from the Russian language where it was originally used to refer to members of the Bolshevik party who were assigned to lead and direct military units during the Russian Revolution in 1917. In this context, commissar refers specifically to someone appointed by the government to supervise or administer a particular area or organization.