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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.
Origin of hallucinate
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. 2015.
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Examples from the web 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

c.1600, "deceive," from Latin alucinatus, later hallucinatus, past participle of alucinari "wander (in the mind), dream; talk unreasonably, ramble in thought," probably from Greek alyein, Attic halyein "be distraught," probably related to alaomai "wander about" [Barnhart, Klein]. The Latin ending probably was influenced by vaticinari "to prophecy," also "to rave." Sense of "to have illusions" is from 1650s. Occasionally used 19c. in transitive senses, "to cause hallucination." Related: Hallucinated; hallucinating.

Online Etymology Dictionary, © 2010 Douglas Harper
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