Okla. Stat. tit. 19 § 863.4
For the purpose of this act, certain terms are defined as provided in this section. Whenever appropriate, the singular includes the plural and the plural includes the singular. "Municipality" or "municipal" shall mean or relate only to incorporated cities and towns. "Mayor" means the chief executive of the municipality, whether the official designation of his office be mayor, city manager or otherwise. "Council" means the legislative body of the municipality. The term "streets" includes streets, avenues, boulevards, roads, lanes, alleys, viaducts, highways and other ways. "Subdivision" and "zoning" are defined as hereinafter provided. "Board" shall mean the board of county commissioners. "Commission" shall mean the metropolitan area planning commission.
"Area" shall mean all territory included within the jurisdiction of the commission.
Okla. Stat. tit. 19, § 863.4