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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
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. 2015.
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Examples from the Web for psychotic
Contemporary Examples
Historical Examples
  • And the sharp uptrend in individual psycho-neurotic and psychotic behavior.

    Hunter Patrol Henry Beam Piper and John J. McGuire
  • He merely mentioned that Andray Dunnan was psychotic and let it go at that.

    Space Viking Henry Beam Piper
  • So, for the first time, we gained an understanding of psychotic condition by comparing it with the normal course of love.

  • Yet they were not psychotic and hardly more than mildly neurotic.

    Disturbing Sun Robert Shirley Richardson
  • And always for the same reason—to stop the steadily rising incidence of psychotic maladjustment.

    The Cartels Jungle Irving E. Cox, Jr.
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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