1. [noun] A board with a corrugated surface against which laundry may be rubbed
2. [noun] (musici) such a board used as a simple percussion instrument
3. [noun] (nautical) a board fastened along a ship's gunwale to prevent splashing; a splashboard
4. [noun] A stretch of ripples or bumps on a dirt or gravel road, mostly occurring at corners; which is caused by wear from traffic, erosion from wet weather, or poor grading.
5. [noun] Device consisting of a corrugated surface to scrub clothes on.
6. [noun] Protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side.
