hal·​lu·​ci·​no·​gen | \ hə-ˈlü-sə-nə-jən How to pronounce hallucinogen (audio) \

Definition of hallucinogen

: a substance that induces hallucinations

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Other Words from hallucinogen

hallucinogenic \ hə-​ˌlü-​sə-​nə-​ˈje-​nik How to pronounce hallucinogenic (audio) \ adjective or noun

Examples of hallucinogen in a Sentence

Recent Examples on the Web

Hallucinations are commonly experienced by people experiencing psychosis or those who have schizophrenia, people on a hallucinogen, or by people who have dementia. Kate Gardner, SELF, "What It’s Like to Be So Sleep Deprived That You Hallucinate," 14 Feb. 2019 Use of other illicit drugs — including cocaine, methamphetamine, heroin, ecstasy and hallucinogens — did not change substantially in the past year, according to the survey results. Karen Kaplan, The Seattle Times, "Vaping among teens spikes, luring new generation of kids into tobacco use," 18 Dec. 2018 The use of hallucinogens including magic mushrooms and ayahuasca has historically been related to spirituality. Elly Belle, Teen Vogue, "People With Depression and Anxiety Could Benefit From Hallucinogens," 10 Aug. 2018 The previous decade, Timothy Leary had embarrassed the school with his questionable research into hallucinogens, often carried out while under their influence. Dan Adams, BostonGlobe.com, "At 89, legendary psychiatrist and marijuana advocate still wonders about Harvard professorship," 28 Apr. 2018 And unlike hippies' hallucinogens in the 1970s or the 1990s inner-city crack epidemic, the current surge in painkiller abuse crosses all lines of gender, race and socioeconomic status. Kaitlin Menza, Good Housekeeping, "Mommy's Little Helper:," 13 Aug. 2016 Regarding high-risk substance use, the percentage of high school students who reported ever using certain illicit drugs -- cocaine, inhalants, heroin, meth, hallucinogens or ecstasy -- fell from 22.6% in 2007 to 14% in 2017. Jacqueline Howard, CNN, "Fewer teens having sex and using drugs, CDC survey finds," 14 June 2018 The mode of thinking of hallucinogen users has been compared to that of primitive peoples, children and schizophrenics. New York Times, "Letters to the Editor," 22 June 2018 Quick backstory for the uninitiated: Father John Misty is the swaggering, hallucinogen-taking, loudmouthed alter ego of Josh Tillman, a persona that sprang to life from Tillman’s psyche after tripping on ayahuasca with a Canadian shaman. Robert Steiner, BostonGlobe.com, "The confessions of Father John Misty," 30 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hallucinogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hallucinogen

1954, in the meaning defined above

History and Etymology for hallucinogen

hallucination + -o- + -gen

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Last Updated

23 Feb 2019

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Time Traveler for hallucinogen

The first known use of hallucinogen was in 1954

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English Language Learners Definition of hallucinogen

: a substance (such as a drug) that causes people to see or sense things that are not real : a substance that causes hallucinations


hal·​lu·​ci·​no·​gen | \ hə-ˈlü-sə-nə-jən How to pronounce hallucinogen (audio) \

Kids Definition of hallucinogen

: a drug that causes hallucinations

Other Words from hallucinogen

hallucinogenic \ hə-​ˌlü-​sə-​nə-​ˈje-​nik \ adjective


hal·​lu·​ci·​no·​gen | \ hə-ˈlüs-ᵊn-ə-jən How to pronounce hallucinogen (audio) \

Medical Definition of hallucinogen

: a substance and especially a drug that induces hallucinations

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More from Merriam-Webster on hallucinogen

Spanish Central: Translation of hallucinogen

Nglish: Translation of hallucinogen for Spanish Speakers

Britannica.com: Encyclopedia article about hallucinogen

Comments on hallucinogen

What made you want to look up hallucinogen? Please tell us where you read or heard it (including the quote, if possible).


to boil down or concentrate

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