"airway" in the noun sense
1. air passage, air duct, airway
a duct that provides ventilation (as in mines)
2. air lane, flight path, airway, skyway
a designated route followed by airplanes in flying from one airport to another
3. respiratory tract, airway
the passages through which air enters and leaves the body
4. airline, airline business, airway
a commercial enterprise that provides scheduled flights for passengers
Source: WordNet® (An amazing lexical database of English)
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