Airport

Facility used primarily by conventional, fixed-wing aircraft. (DOI3) 

1) An area of land or water that is used or intended to be used for the landing and takeoff of aircraft, and includes its buildings and facilities, if any; 2) Facility used primarily by conventional, fixed-wing aircraft; 3) A facility, either on land or water, where aircraft can take off and land. Usually consists of hard-surfaced landing strips, a control tower, hangars and accommodations for passengers and cargo; 4) A landing area regularly used by aircraft for receiving discharging passengers or cargo. (14CFR1) (FAA2)

See also Aerodrome, Aircraft Facility, Heliport.