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 that setting, every user will be screened for cardiac issues and a family history of psychosis, and guided through their trip by two professional facilitators who have a doctor on call—and even then, some users experience a psychotic break or profound dissociative episodes.
—
Ross Andersen, The Atlantic, 12 June 2026
Prosecutors at this second trial say Dominguez, diagnosed with schizophrenia, used heavy and frequent doses of marijuana that heightened his psychosis and led to the attacks.
—Darrell Smith
june 8, Sacbee.com, 8 June 2026
The internet is only just now recovering from the mass psychosis event that kicked off during Heated Rivalry’s inaugural season, which was a ratings hit for HBO Max.
—Charles Pulliam-Moore, The Verge, 1 June 2026
Malek colors him in with shades of anger, tenderness, psychosis, and the sheer pesky individuality of Jimmy.
—Owen Gleiberman, Variety, 20 May 2026
See All Example Sentences for psychosis
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Ross Andersen, The Atlantic, 12 June 2026
Prosecutors at this second trial say Dominguez, diagnosed with schizophrenia, used heavy and frequent doses of marijuana that heightened his psychosis and led to the attacks.
—Darrell Smith
june 8, Sacbee.com, 8 June 2026
The internet is only just now recovering from the mass psychosis event that kicked off during Heated Rivalry’s inaugural season, which was a ratings hit for HBO Max.
—Charles Pulliam-Moore, The Verge, 1 June 2026
Malek colors him in with shades of anger, tenderness, psychosis, and the sheer pesky individuality of Jimmy.
—Owen Gleiberman, Variety, 20 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 Jun. 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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