Whenever in sections 226.010 to 226.190, or any proceeding thereunder, the following words or terms are used, they shall be deemed and taken to have the meaning ascribed to them as follows:
(1) "Civil subdivision", a county, township, road district or other political subdivision of the state or quasi public corporation having legal jurisdiction of the construction and maintenance of public roads;
(2) "Commission", the state highways and transportation commission created under the provisions of sections 226.010 to 226.190;
(3) "Commissioner", one of the members of the commission;
(4) "Engineer", the chief engineer of the highways and transportation commission;
(5) "Hard-surfaced road", a highway surfaced with concrete, comparable types, macadam, properly bound gravel, or the equivalent of properly bound gravel, to be approved by the commission and meeting the federal requirements;
(6) "Municipality" includes a city, town or village;
(7) "State highway", a highway constructed or maintained at the cost of the state, or constructed with the aid of state funds or the United States government funds, or any highway included by authority of law in the state highway system.