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

hallucinator, noun
nonhallucinated, adjective
unhallucinated, adjective
unhallucinating, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
hallucinate (həˈluːsɪˌneɪt)
(intr) to experience hallucinations
[C17: from Latin ālūcinārī to wander in mind; compare Greek aluein to be distraught]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

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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