v. & n.
v.tr. 1 wash and iron (clothes, linen, etc.). 2 colloq. transfer (funds) to conceal a dubious or illegal origin.
n. a channel for conveying liquids, esp. molten metal. launderer n.
[ ME launder (n.) washer of linen, contr. of lavander f. OF lavandier ult. f. L lavanda things to be washed, neut. pl. gerundive of lavare wash ]