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A radio wave that travels upward.
(Telecommunications) a radio wave reflected back to the earth by the ionosphere (ionospheric wave), permitting transmission around the curved surface of the earth. Compare ground wave
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|Noun||1.||sky wave - a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface|
radio emission, radio radiation, radio wave - an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m
ionospheric wave - a sky wave that is reflected by the ionosphere