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
Originally, the jury at the court in Sheffield was told that there was no physical reason for the psychosis Mia experienced.
—
Sam Gillette, PEOPLE, 26 Nov. 2025
Spors is diagnosed with schizoaffective disorder, with symptoms such as psychosis, hallucinations, depression and mania.
—Eva Wen, jsonline.com, 21 Nov. 2025
However, it was subsequently discovered that Phillips had previously been diagnosed with psychosis, paranoia and major depressive disorder at John Peter Smith Hospital, according to Denton County sheriff’s records.
—Matthew Adams, Fort Worth Star-Telegram, 7 Nov. 2025
The film, directed by Lynne Ramsay, who also co-wrote the screenplay alongside Enda Walsh and Alice Birch, follows Grace (Lawrence), who develops postpartum depression, and, alongside her partner Jackson (Pattinson), enters psychosis.
—Armando Tinoco, Deadline, 5 Nov. 2025
See All Example Sentences for psychosis
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Sam Gillette, PEOPLE, 26 Nov. 2025
Spors is diagnosed with schizoaffective disorder, with symptoms such as psychosis, hallucinations, depression and mania.
—Eva Wen, jsonline.com, 21 Nov. 2025
However, it was subsequently discovered that Phillips had previously been diagnosed with psychosis, paranoia and major depressive disorder at John Peter Smith Hospital, according to Denton County sheriff’s records.
—Matthew Adams, Fort Worth Star-Telegram, 7 Nov. 2025
The film, directed by Lynne Ramsay, who also co-wrote the screenplay alongside Enda Walsh and Alice Birch, follows Grace (Lawrence), who develops postpartum depression, and, alongside her partner Jackson (Pattinson), enters psychosis.
—Armando Tinoco, Deadline, 5 Nov. 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 2 Dec. 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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