psychosis
noun
psy·cho·sis
sī-ˈkō-səs 
plural psychoses
sī-ˈkō-ˌsēz
: a serious mental illness (such as schizophrenia) characterized by defective or lost contact with reality often with hallucinations or delusions
Examples of psychosis in a Sentence
The patient suffers from some kind of psychosis.
Recent Examples on the Web
That’s especially critical given these therapies carry risks, and some people are particularly vulnerable to them — for example, those with a history of psychosis, says Alpert.
—
Lisa Jarvis, Twin Cities, 13 May 2026
The treatable conditions can include depression, anxiety, OCD, PTSD, and psychosis.
—Breana Pitts, CBS News, 11 May 2026
Salieri, despite Bettany’s compelling performance, is a wearisome figure consumed by jealousy while clearly toiling under a storm of religious psychosis.
—Aramide Tinubu, Variety, 8 May 2026
As Delphi’s star rises, P Burke becomes enthralled by her and descends into a tech psychosis with disastrous consequences.
—Melanie Goodfellow, Deadline, 6 May 2026
See All Example Sentences for psychosis
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Lisa Jarvis, Twin Cities, 13 May 2026
The treatable conditions can include depression, anxiety, OCD, PTSD, and psychosis.
—Breana Pitts, CBS News, 11 May 2026
Salieri, despite Bettany’s compelling performance, is a wearisome figure consumed by jealousy while clearly toiling under a storm of religious psychosis.
—Aramide Tinubu, Variety, 8 May 2026
As Delphi’s star rises, P Burke becomes enthralled by her and descends into a tech psychosis with disastrous consequences.
—Melanie Goodfellow, Deadline, 6 May 2026
See All Example Sentences for psychosis
Cite this Entry
“Psychosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psychosis. Accessed 21 May. 2026.
Copy CitationKids Definition
psychosis
noun
psy·cho·sis
sī-ˈkō-səs
plural psychoses
-ˈkō-ˌsēz
: a serious mental illness marked by loss of or greatly lessened ability to test whether what one is thinking and feeling about the real world is really true
Medical Definition
psychosis
noun
psy·cho·sis
sī-ˈkō-səs
plural psychoses
-ˌsēz
: a serious mental illness (as schizophrenia) characterized by defective or lost contact with reality often with hallucinations or delusions
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