Medical Dictionary


noun hal·lu·ci·na·tion \hə-ˌlüs-ən-ˈā-shən\

Medical Definition of HALLUCINATION

:  a perception of something (as a visual image or a sound) with no external cause usually arising from a disorder of the nervous system (as in delirium tremens or in functional psychosis without known neurological disease) or in response to drugs (as LSD)—compare delusion 2, illusion 2a
:  the object of a hallucinatory perception


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