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
Hathaway’s White Queen floats with sweet highs and dark lows, her heavenly air masking a morbid psychosis.
—
Chris Feil, Vulture, 1 May 2026
Of course, those problems proved significant — and manifested as AI psychosis, suicide, murder, and several mass shootings that have been linked to the tech.
—Frank Landymore, Futurism, 29 Apr. 2026
However, a growing body of research points to possible adverse effects from cannabis use, particularly in vulnerable groups, such as people who are pregnant, adolescents, people with preexisting mental health conditions such as schizophrenia or psychosis, and those with cardiac issues.
—Carey S. Cadieux, The Conversation, 29 Apr. 2026
This is when a parent kills their child during a state of psychosis or hallucinating.
—Chelsea Bailey, CNN Money, 22 Apr. 2026
See All Example Sentences for psychosis
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Chris Feil, Vulture, 1 May 2026
Of course, those problems proved significant — and manifested as AI psychosis, suicide, murder, and several mass shootings that have been linked to the tech.
—Frank Landymore, Futurism, 29 Apr. 2026
However, a growing body of research points to possible adverse effects from cannabis use, particularly in vulnerable groups, such as people who are pregnant, adolescents, people with preexisting mental health conditions such as schizophrenia or psychosis, and those with cardiac issues.
—Carey S. Cadieux, The Conversation, 29 Apr. 2026
This is when a parent kills their child during a state of psychosis or hallucinating.
—Chelsea Bailey, CNN Money, 22 Apr. 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 3 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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