of or pertaining to an advanced mound-building and agricultural Amerindian culture 100 b.c.–a.d. 400, centered in Ohio and Illinois and characterized by geometric earthworks, many large conical or dome-shaped burial mounds, corded and stamped pottery, ornamental knives and tobacco pipes, and the extensive trading of raw materials and artifacts.
Also, Hope·well·i·an.
Origin: after Cloud Hopewell, owner (circa 1890) of a farm in Ross Co., Ohio, on which tumuli characterizing the culture were excavated