Used by arrangement with John Wiley & Sons, Inc.
- Nautical The distance between the water line and the freeboard deck of a ship.
- The distance between normal water level and the top of a structure, such as a dam, that impounds or restrains water.
- The distance between the ground and the undercarriage of an automobile.
Origin: Probably ultimately partial translation of Anglo-Norman franc bord, land claimed outside the fence of a park or forest : franc, free + bord, bort, border; see border.