Noun
a radio wave propagated on or near the earth's surface
Source: WordNetA skip zone is an annular region between the farthest points at which the ground wave can be received and the nearest point at which the refracted sky waves can be received. Source: Internet
In some cases, a ground wave may be so altered that new components appear to arise from reflection in regions of rapidly changing dielectric constant. Source: Internet
The propagation of sound waves through the ground taking advantage of the earths ability to more efficiently transmit low frequency is known as Audio ground wave (AGW). Source: Internet