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[sahy-kot-ik] /saɪˈkɒt ɪk/
Psychiatry. of or relating to psychosis: psychotic symptoms;
psychotic delusion.
(loosely) mentally unstable:
The man who threw a stone through the convenience store window must be psychotic.
intensely upset, anxious, or angry; crazy:
My dad gets so psychotic when I come home even a little bit late.
Psychiatry. a person afflicted with psychosis.
(loosely) someone who is mentally unstable:
I always cross the street when I have to go past that homeless shelter; it's full of psychotics.
Synonyms: nut, kook, cuckoo, loony, loon.
someone who exhibits extreme emotion or behavior:
My brother turns into a complete psychotic whenever his team loses.
Synonyms: lunatic, maniac, psycho.
Origin of psychotic
First recorded in 1885-85; psych(osis) + -otic
Related forms
psychotically, adverb
nonpsychotic, adjective
semipsychotic, adjective
unpsychotic, adjective
Can be confused Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for psychotic
Contemporary Examples
Historical Examples
  • He merely mentioned that Andray Dunnan was psychotic and let it go at that.

    Space Viking Henry Beam Piper
  • Yet they were not psychotic and hardly more than mildly neurotic.

    Disturbing Sun Robert Shirley Richardson
  • And then again, a psychotic or a professional gunsel may not register at all.

    The Circuit Riders R. C. FitzPatrick
  • If you are psychotic, your behavior may hurt others or yourself.

  • The eyes opened as a hand shook the psychotic Mersey by the shoulder.

    The Inhabited Richard Wilson
British Dictionary definitions for psychotic


of, relating to, or characterized by psychosis
a person experiencing psychosis
Derived Forms
psychotically, adverb
Usage note
It is preferable to talk about a person experiencing psychosis rather than a psychotic, which reduces a person's individuality
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for psychotic

1889, coined from psychosis, on the model of neurotic/neurosis, from Greek psykhe- "mind, soul" (see psyche).


"a psychotic person," 1901, from psychotic (adj.).

Online Etymology Dictionary, © 2010 Douglas Harper
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psychotic in Medicine

psychotic psy·chot·ic (sī-kŏt'ĭk)
Of, relating to, or affected by psychosis. n.
A person affected by psychosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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psychotic in Science
Plural psychoses (sī-kō'sēz)
A mental state caused by psychiatric or organic illness, characterized by a loss of contact with reality and an inability to think rationally. A psychotic person often behaves inappropriately and is incapable of normal social functioning.

psychotic adjective (sī-kŏt'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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