As used in this subchapter, unless the context otherwise requires:
(1) “Airport” means any area of land usable for the landing and taking off of airplanes;
(2) A city is “served” by an airport if the airport is used for private flying or otherwise as a point of arrival or departure by air by persons residing or having their place of business in the city;
(3) An airport is of the “public utility class” if it is available to the general public for private flying or otherwise as a point of arrival or departure by air;
(4) “Person” means any individual, firm, copartnership, public or private corporation, company, association, joint-stock association, or body politic and includes any trustee, receiver, assignee, or other similar representative thereof; and
(5) “Structure” means any object constructed or installed by man including, but without limitation, buildings, towers, smokestacks, and overhead transmission lines.