n. In engineering, any operation in which earth is removed or thrown up, as in cuttings, embankments, etc.n. In fortification, any offensive or defensive construction formed chiefly of earth: commonly in the plural.n. Any similar construction, as the ancient mounds of earth found in various parts of the United States, of unknown use and origin. They differ widely in form, but are always well defined in plan, and sometimes inclose large areas.