hallucinate

verb

hal·​lu·​ci·​nate hə-ˈlü-sə-ˌnāt How to pronounce hallucinate (audio)
hallucinated; hallucinating

transitive verb

1
: to affect with visions or imaginary perceptions
2
: to perceive or experience as a hallucination
hallucinator noun

Examples of hallucinate in a Sentence

The patient may hallucinate if she has a fever.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The severity of one’s reaction can vary, but considering Lochlan drank an entire glass of the stuff and was puking and passed out by the pool, hallucinating drowning as his family and then a group of monks look on, his reaction seemed pretty darn severe. Jodi Guglielmi, Rolling Stone, 7 Apr. 2025 The zaniness that made for their fourth victory of the season that was secured after they were tied or trailing in the seventh inning followed one of the strangest starts to a game that could be imagined or concocted or hallucinated. Kevin Acee, San Diego Union-Tribune, 6 Apr. 2025 Recent research has shown that AI transcription systems can hallucinate during doctor-patient conversations, raising serious concerns about their reliability at scale. Hessie Jones, Forbes.com, 3 Apr. 2025 The actor makes the most of the material served to him on a silver platter, like berating Bart for his history of domestic violence or hallucinating his way through an infected gunshot wound. Alison Herman, Variety, 14 Mar. 2025 See All Example Sentences for hallucinate

Word History

Etymology

Latin hallucinatus, past participle of hallucinari, allucinari to prate, dream, modification of Greek alyein to be distressed, to wander

First Known Use

circa 1834, in the meaning defined at transitive sense 1

Time Traveler
The first known use of hallucinate was circa 1834

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Cite this Entry

“Hallucinate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hallucinate. Accessed 15 Apr. 2025.

Kids Definition

hallucinate

verb
hal·​lu·​ci·​nate hə-ˈlüs-ə-ˌnāt How to pronounce hallucinate (audio)
hallucinated; hallucinating
: to have hallucinations or experience as a hallucination

Medical Definition

hallucinate

verb
hal·​lu·​ci·​nate hə-ˈlüs-ᵊn-ˌāt How to pronounce hallucinate (audio)
hallucinated; hallucinating

transitive verb

1
: to affect with visions or imaginary perceptions
the patient is not hallucinated
2
: to perceive or experience as a hallucination
may hallucinate monsters or attackersM. J. Horowitz

More from Merriam-Webster on hallucinate

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