psycho

1 of 2

noun

psy·​cho ˈsī-(ˌ)kō How to pronounce psycho (audio)
plural psychos
informal + disparaging

psycho

2 of 2

adjective

informal + disparaging
: of, relating to, or being a person who is mentally or emotionally unsound or unstable especially in a way that results in dangerous or violent behavior

Examples of psycho in a Sentence

Noun a story based on a real-life psycho who had serious mother-son issues
Recent Examples on the Web
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Noun
Texturally, the series is best categorized as a psycho-thriller, but the design of the episodes is never redundant. WIRED, 17 Mar. 2023 Another summer, another hook-wielding psycho killer — and maybe some familiar faces too. Jessica Wang, EW.com, 7 Feb. 2023 Melissa Barrera as Sam Carpenter Melissa Barrera 'Scream VI.' | Credit: Philippe Bossé/Paramount Tara's sister Sam has also moved east to keep an eye on her sibling and an eye out for a certain mask-wearing psycho. Clark Collis, EW.com, 8 Mar. 2023 How James Dearden’s original script entered development as a sympathetic portrayal of a single woman until studio execs turned it into the story of a villainous, largely unsympathetic psycho. Vulture, 5 Apr. 2022 See all Example Sentences for psycho 

Word History

Etymology

Noun

short for psychopath

Adjective

short for psychopathic entry 1

First Known Use

Noun

1919, in the meaning defined above

Adjective

1945, in the meaning defined above

Time Traveler
The first known use of psycho was in 1919

Dictionary Entries Near psycho

Cite this Entry

“Psycho.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psycho. Accessed 22 Nov. 2024.

Kids Definition

psycho

1 of 2 noun
psy·​cho ˈsī-kō How to pronounce psycho (audio)
informal
: a person of unsound mind
used disparagingly

psycho-

2 of 2 combining form
: mind : mental processes and activities
psychotherapy
Etymology

Noun

short for psychopath

Combining form

derived from Greek psychē "soul, mind, principle of life"

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