Wash'-bōard, n.

n. 1. A board with a fluted or ribbed surface on which clothes are rubbed in being washed.

2. A board running round and facing the walls of a room, next to the floor; mop-board.
3. (Naut.) A broad, thin plank, fixed occasionally on the top of a boat or other small vessel’s side, to prevent the sea from breaking over; also, a piece of plank on the sill of a lower deck port, for the same purpose;—called also waste-board. Mar. Dict.