A delusion is a belief based on an inaccurate interpretation of reality, despite clear evidence to the contrary. A delusional disorder causes a person to have delusional thoughts for a prolonged ...

Delusions are beliefs that aren't based on reality, culture, religion, or social identity. The people affected by them can’t be convinced by facts or reason that their delusional belief is untrue.

Delusions are false beliefs held with unwavering commitment despite proof they’re incorrect. Persecutory delusions — the belief that someone plans to harm, harass, or sabotage you — are the most ...