Definition of: launder

(lôn′dər, län′-) v.t.
1. To wash and iron, as clothing.
—v.i.
2. To wash and iron laundry.
3. To undergo washing and ironing.
—noun A trough or gutter, as of wood, for conveying water. [Contraction of ME lavender a laundress <OF lavendier a washerwoman <LL lavandarius, ult. <L lavare wash]
—laun′·der·er noun