As used in this chapter, unless the context otherwise requires:
"Airport" means any area of land or water designed and set aside for the landing and taking-off of all aircraft and utilized or to be utilized in the interest of the public for such purposes;
"Airport hazard" means any structure or tree which obstructs the air space required for the flight of aircraft in landing or taking-off at an airport, or any use of land which creates a dangerous condition, including the placement of strong lights which blind pilots during such operations;
"Airport hazard area" means any area of land or water upon which an airport hazard might be established if not prevented as provided in this chapter;
"Airport protection" means protection against an airport hazard;
"Department" means the department of transportation;
"Director" means the director of transportation or the director's authorized representative;
"Person" means any individual, partnership, corporation, unincorporated association, joint stock association, or any trustee, receiver, assignee, or other similar representative thereof; or the State or any of its political subdivisions, or agencies thereof;
"Structure" means any object constructed or installed by humans, including, but without limitation, buildings, towers, smokestacks, chimneys, and overhead transmission lines;
"Tree" means any object of natural growth.