Haw. Code R. § 19-12-2
As used in this chapter, unless the context clearly indicates otherwise:
"Airport" means any area of land or water designed or 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 airspace 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 chapter 262, Hawaii Revised Statutes.
"Airport protection" means protection against an airport hazard.
"Director" means the director of transportation or his authorized representative.
"Department" means, the department of transportation of the State of Hawaii.
"FAA" means the Federal Aviation Administration.
"Height" means distance above ground level, unless otherwise specified.
"Military airport" means an airport owned or operated by the United States Department of Defense or any branch or agency thereof.
"Nonconforming use" means any pre-existing structure or tree, or other use of land which is inconsistent with the provisions of these rules or of chapter 262, Hawaii Revised Statutes.
"Nonprecision instrument runway" means a runway having an existing instrument approach procedure utilizing air navigation facilities with only horizontal guidance, or area type-navigation equipment, for which a straight-in nonprecision instrument approach procedure has been approved, or planned, and for which no precision approach facilities are planned, or indicated on a state, FAA, or military service planning document.
"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.
"Precision instrument runway" means a runway having an existing instrument approach procedure utilizing an instrument landing system (ILS), ground controlled approach (GCA), or a precision approach radar (PAR). It also means a runway for which a precision approach system is planned and is so indicated-by an approved airport layout plan, a military service approved military airport layout plan, any other State or FAA planning document, or military service military airport planning document.
"Private airport" means an airport owned or operated by a person and not open to the public.
"Public airport" means an airport owned or operated by the State, municipality, county, or other political subdivision or public corporations of the State, and open for the use of the general public.
"Quasi-public airport" means an airport owned or operated by a person and open to the public in part or in whole as evidenced by its use by either aircraft operators or paying passengers carried in privately owned aircraft, operated for hire.
"Rules" means the rules governing airport zoning as set forth in this chapter.
"Runway" means the area of airport designated for the landing and taking-off of aircraft.
"State" means the State of Hawaii.
"Structure" means any object constructed or installed by man, including but not limited to buildings, towers, smokestacks, chimneys, and overhead transmission lines.
"Tree" means any object of natural growth.
"Utility runway" means a runway that is constructed for and intended to be used by propeller driven aircraft of twelve thousand five hundred maximum gross weight and less.
"Visual runway" means a runway intended solely for the operation of aircraft using visual approach procedures, with no straight-in instrument approach procedure and no instrument designation indicated on an approved-airport layout plan, a military service approved military airport layout plan, or by a planning document submitted to the FAA by competent authority.
Haw. Code R. § 19-12-2