CAUSEWAY, or CAUSEY, a massive construction of stones, stakes, and fascines, or an elevation of fat viscous earth, well beaten, serving either as a road in wet marshy places, or as a mole to retain the waters of a pond, or prevent a river from overflowing the lower grounds. See ROAD. The word is derived from the French chaussée, anciently written chaulsée; and that, again, from the Latin calcata, or calcata, which, according to Sommer and Spelman, comes a calcando.