[ sahy-kot-ik ]
/ saɪˈkɒt ɪk /



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.

someone who exhibits extreme emotion or behavior: My brother turns into a complete psychotic whenever his team loses.

Origin of psychotic

First recorded in 1885–85; psych(osis) + -otic

Related forms

psy·chot·i·cal·ly, adverbnon·psy·chot·ic, adjectivesem·i·psy·chot·ic, adjectiveun·psy·chot·ic, adjective

Can be confused

neurotic psychotic schizoid schizophrenic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for psychotic

British Dictionary definitions for psychotic


/ (saɪˈkɒtɪk) psychiatry /


of, relating to, or characterized by psychosis


a person experiencing psychosis

Derived Forms

psychotically, adverb


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

Medicine definitions for psychotic


[ sī-kŏtĭk ]


Of, relating to, or affected by psychosis.


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.

Science definitions for psychotic


[ sī-kōsĭs ]

Plural psychoses (sī-kōsēz)

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.

Related forms

psychotic adjective (sī-kŏtĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.