psycho

[ sahy-koh ]
/ ˈsaɪ koʊ /
Slang.

noun, plural psy·chos.

a psychopathic or psychotic person.
a crazy or mentally unstable person.

adjective

psychopathic or psychotic.
crazy; mentally unstable.

Origin of psycho

First recorded in 1935–40; by shortening

Definition for psycho (2 of 2)

psycho-

a combining form representing psyche (psychological) and psychological (psychoanalysis) in compound words.
Also especially before a vowel, psych-.

Origin of psycho-

< Greek, combining form of psȳchḗ breath, spirit, soul, mind; akin to psȳ́chein to blow (see psykter)

Example sentences from the Web for psycho

British Dictionary definitions for psycho (1 of 2)

psycho
/ (ˈsaɪkəʊ) /

noun, adjective plural -chos

an informal and offensive word for psychopath or psychopathic See psychopath

British Dictionary definitions for psycho (2 of 2)

psycho-

sometimes before a vowel psych-


combining form

indicating the mind or psychological or mental processes psychology; psychogenesis; psychosomatic

Word Origin for psycho-

from Greek psukhē spirit, breath

Medical definitions for psycho (1 of 2)

psycho
[ sīkō ]

n.

A psychopath.

adj.

Crazy; insane.

Medical definitions for psycho (2 of 2)

psycho-

pref.

Mind; mental:psychogenic.
Mental activities or processes:psychomotor.
Psychology; psychological:psychosocial.