Definitions
1.nounA board with a corrugated surface against which laundry may be rubbed.
2.nounSuch a board used as a simple percussion instrument.
3.nounA board fastened along a ship's gunwale to prevent splashing; a splashboard.
4.nounA stretch of ripples or bumps on a dirt or gravel road caused by interaction between traffic and road surface.
5.nounBaseboard; skirting board
6.verbTo produce a rippled texture on a surface.
7.verbTo play a washboard.
8.verb(bees) To move up and down or back and forth across the surface of a hive, possibly to lay down a layer of propolis and wax.