Simple examples:
* In lieu of a birthday party, we're having a picnic in the park. (Instead of a birthday party)
* The company offered a bonus in lieu of a raise this year. (Instead of a raise)
* He sent a letter in lieu of a phone call. (Instead of a phone call)
More complex examples:
* In lieu of traditional homework assignments, students will be completing a project-based learning experience.
* The museum offered a free guided tour in lieu of its usual admission fee for seniors.
* The judge ordered the defendant to perform community service in lieu of jail time.
Key points:
* "In lieu of" always means "instead of."
* It's a formal phrase, so use it in written communication or formal speech.
* The phrase is followed by a noun or noun phrase.
Let me know if you have any other questions!