A passage for air, especially in the body (respiratory tract) or a designated route for aircraft. Can refer to both biological and aviation contexts.
Compound of 'air' (Greek 'aer') + 'way' (Old English 'weg'). First used medically in early 1900s for respiratory passages, then adopted by aviation industry in 1920s for flight routes.
This word elegantly spans from the most intimate - the delicate tubes in our lungs - to the most expansive - invisible highways in the sky that planes follow. Both meanings share the essential concept of controlled, safe passage for something vital to flow through space.
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