a radio wave that propagates on or near the earth’s surface and is affected by the ground and the troposphere.
a radio wave that travels directly between a transmitting and a receiving aerial Compare sky wave
plural noun 1. Shipbuilding. hardwood timbers laid end-to-end to form an inclined track on which the keel of a ship can slide during launching.
noun, Electricity. 1. a lead from an electric apparatus to the earth or to a ground connection.
[ground-woo d] /ˈgraʊndˌwʊd/ noun, Papermaking. 1. that has been for making into pulp.
noun 1. wood pulp consisting of groundwood that has not been cooked or chemically treated, used for making newsprint and other poorer grades of paper.