(1) "Airport" means any area of land or water which is used, or intended for use, for the landing and takeoff of aircraft and any appurtenant areas which are used, or intended for use, for airport buildings or other airport facilities or rights-of-way, together with all airport buildings and facilities located thereon;

(2) "Air navigation facility" means any facility, other than one owned and operated by the United States, used in, available for use in, or designed for use in aid of air navigation, including any structures, mechanism, lights, beacons, markers, communicating systems, or other instrumentalities or devices used or useful as an aid, or constituting an advantage or convenience, to the safe taking off, navigation, and landing of aircraft or the safe and efficient operation or maintenance of an airport and any combination of any or all of these facilities;

(3) "Airport hazard" means any structure, object of natural growth, or use of land which obstructs the airspace required for the flight of aircraft in landing or taking off at an airport or is otherwise hazardous to the landing or taking off of aircraft;

(4) "Municipality" means any municipality of the first or second class, the city limits of which are within five (5) miles of a boundary line of this state; and

(5) "Person" means any individual, firm, partnership, corporation, company, association, joint-stock association, or body politic and includes any trustee, receiver, assignee, or other similar representative thereof.