1. a tract of land or water with facilities for the landing, takeoff, shelter, supply, and repair of aircraft, especially one used for receiving or discharging passengers and cargo at regularly scheduled times.

noun Nautical.

  1. a porthole designed to be opened to the outside air.


  1. a landing and taking-off area for civil aircraft, usually with surfaced runways and aircraft maintenance and passenger facilities

1919, from air (n.1) + port (n.1). First reference is to Bader Field, outside Atlantic City, New Jersey, U.S., which opened in 1910.

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