Medical Dictionary


noun de·lu·sion \di-ˈlü-zhən\

Medical Definition of DELUSION

a :  the act of deluding :  the state of being deluded b :  an abnormal mental state characterized by the occurrence of psychotic delusions
:  a false belief regarding the self or persons or objects outside the self that persists despite the facts and occurs in some psychotic states—compare hallucination 1, illusion 2a
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