Causer, a massive construction of stone, flake, and falcons; 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 Chaussee; and that from the Latin Calceata, or Calceata; according to Sommer and Spelman, a calceata. Bergier rather takes the word to have had its rise a pedimente calceatis, 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 calceae, 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 Horley suspects it to be of later times. Giant's Causeway, is a denomination given to a huge pile of stony columns in the district of Coleraine in Ireland. See Giant's Causeway.