Definitions for "Skywave"
A radio wave that travels upward.
A signal that is received via the signal radiating into the air and bouncing off of the earth's ionosphere. Nighttime reception of distant stations is known as skywave reception. This is a station's "skywave signal". At night you might pick up a distant station via skywave, yet you'll pick up your local AM station still by groundwave. (see also groundwave)
a radio wave from a distant radio station (or rarely, a TV station that is refracted in the ionosphere