Definition of hallucination
1a : perception of objects with no reality usually arising from disorder of the nervous system or in response to drugs (such as LSD) was having hallucinationsb : the object so perceived wasn't sure if the rain was real or a hallucination
2 : an unfounded or mistaken impression or notion : delusion
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Examples of hallucination in a Sentence
He could not tell if what he was seeing was real or if it was a hallucination.
He has been having hallucinations due to the medication.
Recent Examples of hallucination from the Web
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The second is dementia with Lewy bodies, which causes forgetfulness, fluctuations in alertness, visual hallucinations and trouble walking.
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Others, who had hallucinations, might become shamans.
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These programs are used by adults and children suffering from hallucinations, paranoia, anxiety, anger, depression and aggressive behavior.
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Officials say the effects of synthetic marijuana can include agitation, extreme nervousness, nausea, vomiting, diarrhea, a racing heartbeat, hallucination and dilated pupils.
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Without extensive training, lack of oxygen can bring on serious frostbite, as well as a condition called hypoxia that affects the brain, causing headaches, hallucinations and eventually death.
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A cunning parasite worms its way into people's brains, inducing hallucinations and sending them into New York City's streets in search of new victims.
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Another aspect of the training is for officers to understand how visual or auditory hallucinations affect those suffering from them, Collins said.
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A Journey from Milan to Reggio, the disorder can lead to spontaneous fainting, confusion, and hallucinations.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hallucination'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of hallucination
see hallucinate
Synonym Discussion of hallucination
HALLUCINATION Defined for English Language Learners
hallucination
playDefinition of hallucination for English Language Learners
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: something (such as an image, a sound, or a smell) that seems real but does not really exist and that is usually caused by mental illness or the effect of a drug
HALLUCINATION Defined for Kids
hallucination
playDefinition of hallucination for Students
: the seeing of objects or the experiencing of feelings that are not real but are usually the result of mental disorder or the effect of a drug
Medical Dictionary
hallucination
playMedical Definition of hallucination
1: a perception of something (as a visual image or a sound) with no external cause usually arising from a disorder of the nervous system (as in delirium tremens or in functional psychosis without known neurological disease) or in response to drugs (as LSD)—compare delusion 2, illusion 2a
2: the object of a hallucinatory perception
Learn More about hallucination
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See words that rhyme with hallucination Thesaurus: All synonyms and antonyms for hallucination Spanish Central: Translation of hallucination Nglish: Translation of hallucination for Spanish speakers Britannica English: Translation of hallucination for Arabic speakers Britannica.com: Encyclopedia article about hallucination
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