de·​re·​al·​i·​za·​tion (ˌ)dē-ˌrē-ə-lə-ˈzā-shən How to pronounce derealization (audio)
: a feeling of altered reality (such as that occurring in schizophrenia or in some drug reactions) in which one's surroundings appear unreal or unfamiliar

Example Sentences

Recent Examples on the Web Could derealization have inspired all these metaphysical conjectures? John Horgan, Scientific American, 14 June 2022 Along with dissociative amnesia and depersonalization/derealization disorder, DID is one of three types of dissociative disorders, the American Psychiatric Association (APA) explains. Sarah Jacoby, SELF, 20 Apr. 2021 People with dissociative psychiatric conditions such as derealization or depersonalization syndrome report that their perceptual worlds, even their own selves, lack a sense of reality. Anil K. Seth, Scientific American, 27 Aug. 2019

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

Word History

First Known Use

1942, in the meaning defined above

Time Traveler
The first known use of derealization was in 1942

Dictionary Entries Near derealization

Cite this Entry

“Derealization.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2022.

Medical Definition



variants or British derealisation
: a feeling of altered reality that occurs often in schizophrenia and in some drug reactions
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