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English definition of “hallucinate”

hallucinate

verb [I] uk   /həˈluː.sɪ.neɪt/ us  
to seem to see, hear, feel, or smell something that does not exist, usually because you are ill or have taken a drug: Mental disorders, drug use and hypnosis can all cause people to hallucinate.
(Definition of hallucinate from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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