n.
Pronunciation: ' wo ̇ sh- ˌ bo ̇ rd, ' wäsh-
Function: noun
Date: 1742
1 : a broad thin plank along a gunwale or on the sill of a lower deck port to keep out the sea
2 : BASEBOARD
3 a : a corrugated rectangular surface that is used for scrubbing clothes or as a percussion instrument b : a road or pavement so worn by traffic as to be corrugated transversely c : an abdominal area characterized by prominent and well-defined musculature ― usually used attributively <a bodybuilder with washboard abs> <a washboard stomach>