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[huh-loo-suh-neyt] /həˈlu səˌneɪt/
verb (used without object), hallucinated, hallucinating.
to have hallucinations.
verb (used with object), hallucinated, hallucinating.
to affect with hallucinations.
1595-1605; < Latin hallūcinātus, past participle of (h)allūcināri to wander in mind; see -ate1
Related forms
hallucinator, noun
nonhallucinated, adjective
unhallucinated, adjective
unhallucinating, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for hallucinate
  • In severe cases, patients might hallucinate or experience seizures, even a week or more after they stop taking the drug.
  • In severe cases, patients might hallucinate or experience seizures, even a week or more after the drug has been stopped.
  • Though she tended to hallucinate toward the end of this surely ill-advised test, she surprisingly suffered no lasting ill effects.
  • They don't cause users to hallucinate, rather, they tweak reality.
  • It's another thing to be so tired that you begin to hallucinate.
  • His speech became slurred, and he began to hallucinate.
  • He does not hallucinate and has periods of forgetfulness although he is often quite mentally alert.
  • Jack then began to hallucinate and spent the night sleeping on the ground.
  • She was unable to sit up, began to hallucinate and was unable to control her bodily movements or functions.
  • But my uncle also said that they gave them drugs to make them fight, to make them hallucinate and fight.
British Dictionary definitions for hallucinate


(intransitive) to experience hallucinations
Derived Forms
hallucinator, noun
Word Origin
C17: from Latin ālūcinārī to wander in mind; compare Greek aluein to be distraught
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for hallucinate
1604, "deceive," from L. alucinatus, later hallucinatus, pp. of alucinari "wander (in the mind), dream," probably from Gk. alyein, Attic halyein "be distraught," probably related to alasthai "wander about." The L. ending probably was influenced by vaticinari "to prophecy," also "to rave." Sense of "to have illusions" is from 1652. Hallucination in the pathological/psychological sense of "seeing or hearing something which is not there" is first recorded 1646; distinct from illusion in not necessarily involving a false belief. Hallucinogen "drug which induces hallucinations" is first recorded 1954; hallucinogenic (adj.) in this sense is from 1952.
Online Etymology Dictionary, © 2010 Douglas Harper
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