/ ˈlɔːndə(r); NAmE / verb [ vn ]
1.
( formal ) to wash, dry and iron clothes, etc. :
freshly laundered sheets
2.
to move money that has been obtained illegally into foreign bank accounts or legal businesses so that it is difficult for people to know where the money came from
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WORD ORIGIN
Middle English (as a noun denoting a person who washes linen): contraction of lavender , from Old French lavandier , based on Latin lavanda things to be washed, from lavare to wash.