2 phrase If you do, get, or give something in lieu, you do, get, or give it instead of something else, because the two things are considered to have the same value or importance.

What is meaning of in lieu thereof?

in lieu thereof adv

(instead, in place of [sth])

What do you mean by in lieu?

: place, stead. in lieu. : instead. in lieu of. : in the place of : instead of.