Definition from Wiktionary, the free dictionary
launder (plural launders)
- (obsolete) A washerwoman.
- (mining) A trough used by miners to receive powdered ore from the box where it is beaten, or for carrying water to the stamps, or other apparatus for comminuting (sorting) the ore.
- A gutter (for rainwater)
washerwoman — see washerwoman
- To wash; to wash, and to smooth with a flatiron or mangle; to wash and iron.
- (obsolete) To lave; to wet.
- (money) To disguise the source of ill-gotten wealth by various means.
to disguise the source of