Lieu is French for “place” and the expression “in lieu of” means “in place of.” Example: “When I retired my boss gave me a framed picture of himself in lieu of the final paycheck he owed me.”

Don’t confuse this expression with “in light of” or “in view of” which means “because of” or “considering.” Example: “In light of his outrageous behavior I decided to sue him.”

And don’t misspell “lieu” as “lue” or “loo” (the latter would be a British bathroom).