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Noun: hallucination  hu,loo-su'ney-shun
  1. Illusory perception; a common symptom of severe mental disorder
  2. A mistaken or unfounded opinion or idea
    "his dreams of vast wealth are a hallucination";
    - delusion
  3. An object perceived during a hallucinatory episode
    "he refused to believe that the angel was a hallucination"

Derived forms: hallucinations

Type of: delusion, misconception, object, psychotic belief

Encyclopedia: Hallucination