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Definition hallucination in British English

hallucination noun

noun
/həˌluːsɪˈneɪʃ(ə)n/
1

something that you think you can see or hear that is not really there, especially because of an illness or the effect of drugs

Synonyms and related words
1.1

the experience of seeing or hearing something that is not really there

Synonyms and related words
Definition hallucination in British English