2. A mental disorder; a false belief strongly held in spite of invalidating evidence; especially, as a mental disorder: Mack had delusions of persecution by all women.
Kerri had delusions of grandeur as an actress.
Sam had the delusion that he was a muscular man as he lifted the weights at the fitness studio.
Zachary had a delusion that all women hated him.
Tanya had the delusion of being extraordinarily beautiful.3. Something falsely disseminated or believed: Technically, a delusion is a belief that, though false, has been surrendered to and accepted by the whole mind as the truth.
The investigators were under the delusion that the safety for the workers was a reality; however, since it was based on a report circulated to the supervisors, it became apparent that they were dishonest and it was made in order to avoid any responsibilities for anything that was really going on.