A delusion is a false belief held by a person. If doctors talk about delusions they mean that the false belief is the result of some disease, usually a disease of the mind, like paranoia.

Diseases

Vrangforestilling | Wahn | Delusion | מחשבות שווא | Waan | 妄想 | Urojenie | Бред | Harhaluulo | 妄想