hallucination

noun

hə-ˌlü-sə-ˈnā-shən How to pronounce hallucination (audio)
Definition of hallucinationnext
1
as in dream
a conception or image created by the imagination and having no objective reality were the voices real, or merely a hallucination?

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in delusion
a false idea or belief the common hallucination that gluttony during the holiday season doesn't have consequences

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How does the noun hallucination contrast with its synonyms?

Some common synonyms of hallucination are delusion, illusion, and mirage. While all these words mean "something that is believed to be true or real but that is actually false or unreal," hallucination implies impressions that are the product of disordered senses, as because of mental illness or drugs.

suffered from terrifying hallucinations

When is it sensible to use delusion instead of hallucination?

The words delusion and hallucination are synonyms, but do differ in nuance. Specifically, delusion implies an inability to distinguish between what is real and what only seems to be real, often as the result of a disordered state of mind.

delusions of persecution

When can illusion be used instead of hallucination?

Although the words illusion and hallucination have much in common, illusion implies a false ascribing of reality based on what one sees or imagines.

an illusion of safety

When is mirage a more appropriate choice than hallucination?

While in some cases nearly identical to hallucination, mirage in its extended sense applies to an illusory vision, dream, hope, or aim.

claimed a balanced budget is a mirage

Example Sentences

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.
Recent Examples of hallucination Ulrich, who was one of the OG Ghostfaces in the thriller, reprised his role in the fifth and sixth installments as a hallucination to his daughter, Sam Loomis, played by Barrera. — Armando Tinoco, Deadline, 6 Oct. 2026 In humans, symptoms often include fever, weakness and headache before progressing to tingling sensations, anxiety, agitation, abnormal behavior, hallucinations, difficulty swallowing, coma and death. — Dean Fioresi, CBS News, 6 Oct. 2026 GPTZero’s authenticity suite, including AI and hallucination detection, plagiarism checking, and writing replay, has been added to Superhuman’s platform. — Nick Lichtenberg, Fortune, 2 Oct. 2026 For instance, in 2024, archaeologists found that an ancient Egyptian vase in the shape of the deity Bes showed traces of chemical plant compounds known to produce hallucinations. — ArsTechnica, 2 Oct. 2026 See All Example Sentences for hallucination
Recent Examples of Synonyms for hallucination
  1. dream
  2. delusion
  3. illusion
  4. myth
  5. daydream
  6. error
  7. vision
  8. fantasy
Noun
  • In a matter of weeks, when the midterm results are tallied and the next campaign begins, Democrats with presidential dreams know the question will be coming.
    — David Weigel, semafor.com, 19 Oct. 2026
  • In his dreams, Jose Fiscal Belli is still living an all-American life with his all-American family.
    — Gregory Royal Pratt, Chicago Tribune, 18 Oct. 2026
Definition of dream
Noun
  • In a number of wrongful death lawsuits, ChatGPT is blamed for driving users to experience harmful delusions and, in some cases, to commit suicide.
    — Ashley Capoot, CNBC, 14 Oct. 2026
  • But a line like that also fleshes out the head-in-the-stratosphere delusions of everyone here.
    — Ryan Lattanzio, IndieWire, 8 Oct. 2026
Definition of delusion
Noun
  • Pokémon cards, a pricey Ferrari shirt and a touristy museum of illusions.
    — Jeanne Bonner, CNN Money, 16 Oct. 2026
  • Rubin, who is also a children's book author and magician, has spent years working in the world of illusion and performance.
    — Danielle Minnetian, FOXNews.com, 14 Oct. 2026
Definition of illusion
Noun
  • Yaga reimagines the myth of Baba Yaga, set in a coastal town.
    — Nicole Fell, HollywoodReporter, 14 Oct. 2026
  • Dante populated his realms of Hell and Purgatory with figures, monsters and moral frameworks borrowed directly from classical Greek and Roman myths.
    — Ed Meza, Variety, 13 Oct. 2026
Definition of myth
Noun
  • The songs on Purdy also have the tone of journal entries, detailing haggard trips to the grocery store, daydreams about his young daughters’ glamorous adult lives, and observations about the banality of oppression.
    — Dash Lewis, Pitchfork, 15 Oct. 2026
  • Walking through prewar Berlin, taking in its historic architecture, Susanna daydreams of her native New York, an ever-changing city where buildings are torn down and rebuilt in the blink of an eye.
    — Literary Hub, Literary Hub, 5 Oct. 2026
Definition of daydream
Noun
  • Someone who visits the malicious website directly may see a 404 error page instead of the fake installer.
    — Kurt Knutsson, FOXNews.com, 17 Oct. 2026
  • The experts, who had all studied AI in academic settings, all brought up the ironies of the automation problem, where AI makes errors that humans can’t catch.
    — Adam Clark Estes, Vox, 16 Oct. 2026
Definition of error
Noun
  • Usher syndrome is a rare genetic disorder that causes vision loss, hearing loss and balance issues, according to the Cleveland Clinic.
    — Charna Flam, PEOPLE, 17 Oct. 2026
  • The condition can cause memory, vision, hearing and balance issues.
    — Madeleine Marr, Miami Herald, 16 Oct. 2026
Definition of vision
Noun
  • The two of them crafted a business plan for a bookstore, one that wouldn’t look out of place in a sword and sorcery fantasy novel, with a hidden speakeasy.
    — Todd Martens, Los Angeles Times, 20 Oct. 2026
  • From this spirited competition emerged two progenitors of modern horror, science fiction, and fantasy.
    — Maria Papadouris, JSTOR Daily, 20 Oct. 2026
Definition of fantasy

Browse Nearby Words

hallucinating
hallucination
hallucinations
See all Nearby Words

Cite this Entry

“Hallucination.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hallucination. Accessed 21 Oct. 2026.

Copy Citation

More from Merriam-Webster on hallucination

Britannica.com: Encyclopedia article about hallucination

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of jilt

See Definitions and Examples »

Popular in Grammar & Usage

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

'Can' vs. 'May'

'Affect' vs. 'Effect'

More Commonly Mispronounced Words

Is it 'nerve-racking' or 'nerve-wracking'?
See More

Popular in Wordplay

See More

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Did 'orange' the fruit or the color come first?

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

The Longest Long Words List

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
artwork of illustrated limes with the text limes and smile with an arrow connecting the two words
Quiz: Spot the Anagram! Scramble these words to find new words with the e...
See All