Causey, a massive construction of stone, flake, 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 Chauffée, anciently wrote Chaulfee; and Causeway, that from the Latin Calecata, or Calcata; according to Somner and Spelman, a calcando. Bergier rather takes the word to have had its rise à pedium 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.

Causeway, calceatum, or calea, more usually denotes a common hard raised way, maintained and repaired with stones and rubbish.

Devil's Causeway, a famous work of this kind, which ranges through the county of Northumberland, commonly supposed to be Roman, though Mr Horsley suspects it to be of later times.

Giant's Causeway, is a denomination given to a huge pile of flinty columns in the district of Coleraine in Ireland. See Giant's Causeway.