psycho

[ sahy-koh ]
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noun,plural psy·chos.
  1. a psychopathic or psychotic person.

  2. a crazy or mentally unstable person.

adjective
  1. psychopathic or psychotic.

  2. crazy; mentally unstable.

Origin of psycho

1
First recorded in 1935–40; by shortening

Other definitions for psycho- (2 of 2)

psycho-

  1. a combining form representing psyche (psychological) and psychological (psychoanalysis) in compound words.

Origin of psycho-

2
<Greek, combining form of psȳchḗ breath, spirit, soul, mind; akin to psȳ́chein to blow (see psykter)
  • Also especially before a vowel, psych-.

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How to use psycho in a sentence

British Dictionary definitions for psycho (1 of 2)

psycho

/ (ˈsaɪkəʊ) /


noun, adjectiveplural -chos
  1. an informal and offensive word for psychopath or psychopathic: See psychopath

British Dictionary definitions for psycho- (2 of 2)

psycho-

combining form
  1. indicating the mind or psychological or mental processes: psychology; psychogenesis; psychosomatic

Origin of psycho-

2
from Greek psukhē spirit, breath

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