noun
hallucination
huh-loo-sih-NAY-shuhn
Hallucination (noun) means a false perception of something that isn't really there, often caused by illness, drugs, or extreme stress. Example: “The patient reported vivid hallucinations during the night.”
noun
1
A false perception of something that isn't really there, often caused by illness, drugs, or extreme stress.
"The patient reported vivid hallucinations during the night."
"Sleep deprivation can trigger mild hallucinations."
2
A confidently stated but false piece of information generated by an AI system.
"The report contained an AI hallucination — a fake statistic with no real source."
How to use hallucination
Learner’s notesIn plain EnglishSomething perceived — or, for AI, generated — that isn't actually real or true.
Common pairings
have a hallucination
AI hallucination
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Word forms
- Plural
- hallucinations
Fill the gap
Can you complete this real example?
The patient reported vivid _____ during the night.
Etymology
From the verb hallucinate, ultimately from Latin hallucinatus.
Synonyms
View more →Related words
Rhymes for hallucination
region
ablation
allusion
emulsion
ideation
novation
diffusion
elocution
extension
oxidation
perfusion
selection
See all rhymes for hallucination →
Frequently asked questions
What does “hallucination” mean?
The word “hallucination” means a false perception of something that isn't really there, often caused by illness, drugs, or extreme stress. In plain terms, something perceived — or, for AI, generated — that isn't actually real or true.
How do you pronounce “hallucination”?
“Hallucination” is pronounced huh-loo-sih-NAY-shuhn (/həˌluːsɪˈneɪʃən/ in IPA).
How do you use “hallucination” in a sentence?
Here is “hallucination” used in a sentence: “The patient reported vivid hallucinations during the night.”
What part of speech is “hallucination”?
“Hallucination” is a noun.
Where does the word “hallucination” come from?
The word “hallucination” comes from Latin. From the verb hallucinate, ultimately from Latin hallucinatus.
How many meanings does “hallucination” have?
“Hallucination” has 2 distinct senses listed in this dictionary. The most common is: a false perception of something that isn't really there, often caused by illness, drugs, or extreme stress.
