620 ILCS 25/2

"Airport" means any area of land or water, or both, designed and set aside for the landing and taking-off of aircraft and utilized or to be utilized in the interest of the public for such purposes. An airport is "publicly-owned" if the portion thereof used for the landing and taking-off of aircraft is owned, operated, controlled, leased to or leased by the United States, any agency or department thereof, this State, or any other State, or any municipality or other political subdivision of this State or any other State, or any other governmental body, public agency or other public corporation.