noun

1. ☆
   1. a board or frame with a ridged surface of metal, glass, etc., used for scrubbing dirt out of clothes or as a percussion instrument in a jug band
   2. the worn surface of a paved road resembling this
2. baseboard
3. Naut. a thin, broad plank fastened along the gunwale of a boat or on the sill of a lower deck port to keep out the sea and spray