CAUSEWAY, or CAUSEY, a massive construction of stone, 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 comes from the French Chaussée, anciently wrote Chaulsee; and that from the Latin Calceata, or Calceata; according to Sommer and Spelman, à calcando. Bergier rather takes the word to have had its rise à pedibus calcis, quibus teruntur. Some derive it from the Latin calx, or French chaux, as supposing it primarily to denote a way paved with chalk-stones.