Pronunciation: (ûrth'wûrk"), [key]
1. excavation and piling of earth in connection with an engineering operation.
2. Mil.a construction formed chiefly of earth for protection against enemy fire, used in both offensive and defensive operations.
3. an artistic work that consists of a large-scale alteration or modification of an area of land in a configuration designed by an artist or of an artist's sculptural installation, as in a museum or gallery, of soil, rock, or similar elemental materials.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.