1) a place where clothes, sheets etc are sent to be washed (laundry)

2) a room in a large house next to the kitchen, where dishes, pots etc are washed up (scullery)

3) any kind of plant growing in the sea, especially on the rocks washed by the sea (seaweed)

4) (of clothes etc) that can be washed without being spoiled (washable)

5) the act of washing or being washed (washing)