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
In truth, Joe himself committed all the murders, with Rhys being a manifestation of his own psychosis.
—
Thomas G. Moukawsher, MSNBC Newsweek, 24 Apr. 2025
Plus, there is another trial ongoing for Alzheimer's psychosis, which would a big opportunity.
—Matthew J. Belvedere, CNBC, 23 Apr. 2025
Marijuana, specifically edibles, can lead to more mental health issues, like psychosis, anxiety and memory loss.
—Greta Cross, USA Today, 20 Apr. 2025
My own experience with autoimmune encephalitis—a disease that distorted my reality, sending me into psychosis and delusions—had left me fascinated by the potentials and limits of our minds.
—Susannah Cahalan, Vogue, 14 Apr. 2025
See All Example Sentences for psychosis
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Thomas G. Moukawsher, MSNBC Newsweek, 24 Apr. 2025
Plus, there is another trial ongoing for Alzheimer's psychosis, which would a big opportunity.
—Matthew J. Belvedere, CNBC, 23 Apr. 2025
Marijuana, specifically edibles, can lead to more mental health issues, like psychosis, anxiety and memory loss.
—Greta Cross, USA Today, 20 Apr. 2025
My own experience with autoimmune encephalitis—a disease that distorted my reality, sending me into psychosis and delusions—had left me fascinated by the potentials and limits of our minds.
—Susannah Cahalan, Vogue, 14 Apr. 2025
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. 2025.
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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