an airmail letter.
a sheet of very lightweight stationery for use in airmail.
another name for aerogram (sense 1)
a system for transporting persons or cargo by aircraft, especially in an emergency. the persons or cargo so transported. the act or process of transporting such a load. a pump for raising liquids by the pressure of air forced into the pump chamber. to transport (persons or cargo) by airlift. of or relating to an […]
a large aircraft specially designed to transport heavy cargo and to land on and take off from a relatively short runway.
light scattered or diffused in the air by dust, haze, etc., especially as it limits the visibility of distant, dark objects by causing them to blend with the background sky.
straight; direct; traveling a direct route: Some railroads advertise air-line routes between stations. Historical Examples Vogel’s suspicion of an air-line in the spectrum of Vesta has, accordingly, not been confirmed. A Popular History of Astronomy During the Nineteenth Century Agnes M. (Agnes Mary) Clerke Tupelo is about forty miles south of Rienzi, on an air-line. […]