Noun

• S: (n) air passage, air duct, airway (a duct that provides ventilation (as in mines))
• S: (n) air lane, flight path, airway, skyway (a designated route followed by airplanes in flying from one airport to another)
• S: (n) respiratory tract, airway (the passages through which air enters and leaves the body)
• S: (n) airline, airline business, airway (a commercial enterprise that provides scheduled flights for passengers)