a condition of seeming happiness that is based on false assumptions and will not last. (Treated as a place grammatically.) • They think they can live on love alone, but they are living in a fool's paradise. • The inhabitants of the island feel politically secure, but they are living in a fool's paradise. They could be invaded at any time.
live in a fool's paradise|fool|fool's paradise|liv
v. phr. To deceive oneself; tell oneself unreal stories. His information is based on a lot of misunderstanding the poor guy is living in a fool's paradise.