As used in this chapter, the following terms shall have the meanings indicated:
Any airplane, aeroplane, flying machine, gas bag, balloon, or any contrivance now known or hereafter invented and used or designed for navigation or flight in the air, except a helicopter, a parachute or other contrivance used primarily as safety equipment.
Any buildings, structures, areas of land, waters or waterways used for the takeoff and landing of aircraft or for the keeping, storing and maintenance of aircraft.