“Business district” means the territory fronting upon a street or highway, including the street or highway, between successive intersections within the municipality, where 50 percent or more of the frontage between successive intersections is occupied by buildings in use for business, or within or outside the municipality where 50 percent or more of the frontage for a distance of 300 feet or more is occupied by buildings in use for business, and the character of the territory is indicated by official traffic-control devices.
(ORC 4511.01(NN))