1
general::
Also, in lieu of;in place of;in someone's stead. In substitution for, rather than. For example, She wore a dress instead of slacks, or They had a soprano in lieu of a tenor, or In place of soft drinks they served fruit juice, or The chairman spoke in her stead. Instead of dates from about 1200; in lieu of, which borrows lieu, meaning "place," from French, dates from the late 1200s; in place of dates from the 1500s; and in someone's stead from the 1200s. Also see under IN SOMEONE'S SHOES.
American Heritage Idioms