Definition of "launder"

launder

/ˈlɔːndə/

noun
plural launders
1. (obsolete) A washerwoman or washerman.
2. (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.
3. A trough or channel carrying water to the wheel of a watermill.
4. A gutter (for rainwater).
verb
third-person singular simple present launders, present participle laundering, simple past and past participle laundered
1. To wash; to wash, and to smooth with a flatiron or mangle; to wash and iron.
2. (obsolete) To lave; to wet.
  Quotations
  Oft did she heave her napkin to her eyne, / Which on it had conceited characters, / Laundering the silken figures in the brine
  1609, William Shakespeare, “A Louers Complaint”, in Shake-speares Sonnets. […], London: By G[eorge] Eld for T[homas] T[horpe] and are to be sold by William Aspley
3. (money) To disguise the source of (ill-gotten wealth) by various means.