As used in this chapter:
"Aircraft" means any contrivance invented, used or designed for navigation or flight in the air except a parachute or other contrivance designed for such navigation but used primarily as safety equipment.
"Airman" means any person who engages in the navigation or direction of aircraft while under way.
"Airport" means any locality, either of land or water, which is used for the landing or taking off of aircraft and which meets the requirements for a rating by the United States department of commerce.
"Commission" means the state aviation commission.
"Director" means the state director of aviation.
"Landing field" means any locality, either of land or water, which is used for the landing or taking off of aircraft and which does not meet the requirements for a rating by the United States department of commerce.