Washboard

1. n. A broad, thin plank, fixed along the gunwale of boat to keep the sea from breaking inboard; also, a plank on the sill of a lower deck port, for the same purpose; — called also wasteboard.
2. n. A fluted, or ribbed, board on which clothes are rubbed in washing them.
3. n. A board running round, and serving as a facing for, the walls of a room, next to the floor; a mopboard.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.