Pronunciation: (wosh'bôrd", -bōrd", wôsh'-),[key] —n. 1. a rectangular board or frame, typically with a corrugated metallic surface, on which clothes are rubbed in the process of washing.
2. a baseboard around the walls of a room.
3. Also called splashboard.Naut. a. a thin, broad plank fastened to and projecting above the gunwale or side of a boat to keep out the spray and sea.
b. a similar board on the sill of a port.
—adj. resembling a washboard in being rough and bumpy: a washboard roadbed.