Delusion

A delusion is commonly defined as a false belief, and is used in everyday language to describe a belief that is either false, fanciful or derived from deception. In psychiatry, the definition is necessarily more precise and implies that the belief is pathological (the result of an illness or illness process).

See also

• belief
• Capgras delusion
• clinical lycanthropy
• Cotard delusion
• delusional disorder
• delusional jealousy
• delusional misidentification syndrome
• delusional parasitosis
• erotomania
• folie à deux
• Fregoli delusion
• Karl Jaspers
• Jerusalem syndrome
• R. D. Laing
• reduplicative paramnesia
• Martha Mitchell effect
• paranoia
• psychosis
• religion
• schizophrenia
• true-believer syndrome