Word.ws English Dictionary

demented

/dɪˈmɛntɪd/

demented adjective: insane; mentally ill. Also the simple past and past participle of dement.

Adjective

demented (comparative more demented, superlative most demented)

  1. Insane; mentally ill.
    • So while Ralph generally seems to inhabit a different, more glorious and joyful universe than everyone else here his yearning and heartbreak are eminently relateable. Ralph sometimes appears to be a magically demented sprite who has assumed the form of a boy, but he’s never been more poignantly...2012 August 5, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993)”, in AV Club, archived from the original on 28 Dec 2012
    • In the past week, he [Donald Trump] attacked the “truly sick and demented people” in the news media, […], not even counting the “deranged scumbags” in Iran.2026 March 16, Peter Baker, “In Choosing ‘Epic Fury,’ Trump Names a War and Defines His Presidency”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC
  2. Having dementia.
  3. (informal) Crazy; ridiculous.
    • a demented idea
    • One of these new recruits is Jagger Froid, a demented alien from the Black Hole Galaxy, who dishes out punishment with a laser-sharp tongue.c. 1990, How to Play Super C (PDF) (instruction manual), Konami, page 4

Also used as

demented is also the simple past and past participle of dement.

demented meaning in Arabic and Vietnamese

demented in Arabic

insane or mentally ill
مَخْبُول maḵbūl, مَجْنُون majnūn, مَسْعُور masʕūr

demented in Vietnamese

insane or mentally ill
loạn trí

Examples of demented in a sentence

  • Ralph sometimes appears to be a magically demented sprite who has assumed the form of a boy, but he’s never been more poignantly, nakedly, movingly human than he is here.2012 August 5, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993)”, in AV...
  • In this sense, it is nothing like his later videos, defined as they are by a near-demented commitment to maximum viewer-stimulation.2025 June 3, Mark O’Connell, “‘The Mozart of the attention economy’: why MrBeast is the world’s biggest YouTube star”, in The Guardian...

All 15 example sentences with demented

Forms of demented

comparativemore demented
superlativemost demented

Origin of demented

Past participle of dement + -ed, from Latin dēmentāre.

Words formed from demented

Questions about demented

What does demented mean?
Demented means insane; mentally ill.
What is demented in Arabic?
Demented in Arabic is مَخْبُول (maḵbūl), مَجْنُون (majnūn), مَسْعُور (masʕūr). See Demented meaning in Arabic.
How do you use demented in a sentence?
Ralph sometimes appears to be a magically demented sprite who has assumed the form of a boy, but he’s never been more poignantly, nakedly, movingly human than he is here.
What part of speech is demented?
Demented is an adjective.
How do you pronounce demented?
Demented is pronounced /dɪˈmɛntɪd/.

Words near demented in the dictionary

  1. dementate
  2. dementated
  3. dementates
  4. dementating
  5. dementation
  6. demented
  7. dementedly
  8. dementedness
  9. dementia
  10. dementia café
  11. dementia cafés

Source and license

Adapted from Wiktionary: demented (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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