Dictionary![]() ![]() air-linePronunciation: (âr'līn"), [key] —adj. straight; direct; traveling a direct route: Some railroads advertise air-line routes between stations. air•linePronunciation: (âr'līn"), [key] —n. 1. Aeron. a. a system furnishing air transport, usually scheduled, between specified points. b. the airplanes, airports, etc., of such a system. c. Often, airlines. a company that owns or operates such a system. 2. a direct line; beeline. 3. an airhose used to pipe air to a deep-sea diver, pneumatic drill, etc. —adj. of or on an airline. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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