Mo. Rev. Stat. § 305.120: Definitions.

As used in sections 305.120 to 305.270, the following terms mean:

(1) "Aeronautics" includes the art and science of flight; aviation; the construction, operation, navigation of aircraft and all component parts thereof; air navigation aids, such as markings, lighting, electric and electronic devices that transmit or receive visual, audible or electronic signals, sounds or displays; navigation and piloting; and also includes airports and the planning, design, construction, repair, improvement, or maintenance thereto or any part thereof; and the dissemination of information and instruction pertaining to all of the foregoing;

(2) "Aircraft" , any device now known or hereafter invented, used or designed for navigation of or flight through the air;

(3) "Airman" , a person, including the person in command of an aircraft or a pilot, mechanic, or member of the crew, who engages in the navigation of an aircraft while under way;

(4) "Airman certificate" , a certificate issued to an airman pursuant to 49 U.S.C. 44702;

(5) "Airport" , an area on land or water that is used or intended to be used for the landing and takeoff of aircraft including buildings, equipment, facilities, rights-of-way, property and appurtenant areas;

(6) "Airport authority" , an entity established in accordance with state law which may plan for, acquire, construct, operate, and maintain an airport or airports as a political subdivision within this state;

(7) "Pilot" , any person licensed to operate aircraft;

(8) "Political subdivision" , any county, city, town, village or other political entity having the authority to tax and to exercise the power of eminent domain;

(9) "Runway" , a defined rectangular area on a land airport prepared specifically for the landing and takeoff of aircraft.