* In lieu of a birthday gift, I asked for a donation to my favorite charity. (meaning instead of)
* The concert was canceled, and a refund will be issued in lieu of a rescheduled performance. (meaning as a replacement for)
* Due to the heavy rain, the picnic was held in the community center in lieu of the park. (meaning instead of)
"Lieu" is often used in the phrase "in lieu of," which means "instead of."