DEMENTED Synonyms: 96 Similar and Opposite Words

demented

adjective

di-ˈmen-təd

Definition of demented

as in psychotic

unable to think in a clear or sensible way a thoughtful movie about a demented man trying to survive on the street

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of demented Moments later, Haaland suddenly made one of his almost demented charges, at Senegal’s goalkeeper. — Zach Helfand, New Yorker, 30 June 2026 The Goalkeeper — nameless, just relentlessly unidentifiable even after at least 30 increasingly demented Google searches and hours on Reddit — wears a yellow Adidas jersey with black detailing. — Jack Lang, New York Times, 9 June 2026 And his demented majesty has no intention of going gentle into that good night. — Theater Critic, Los Angeles Times, 13 May 2026 In our times, whether a demented president would order an unwarranted nuclear attack is just one ominous concern. — Sun Sentinel Editorial Board, Sun Sentinel, 17 Apr. 2026 See All Example Sentences for demented

Recent Examples of Synonyms for demented

Adjective

Unfortunately, his doctor interprets all the screaming about an alien presence in Thomas’ head as a garden-variety psychotic breakdown, and remands him to a more secure facility.

— Tasha Robinson, Vulture, 14 Oct. 2026
It may also be used to treat certain other psychotic conditions, such as psychosis arising in Parkinson disease.

— Encyclopedia Britannica, Encyclopedia Britannica, 7 Oct. 2026

Definition of psychotic

Adjective

First and foremost, as a homeowner myself the property taxes are insane and continue to go up.

— Stephen Korka, Sun Sentinel, 13 Oct. 2026
That may be the name of her next album, but Venus’ insane popularity also speaks to the way Metropia is moving forward, constantly looking for the next shiny thing.

— Kate Erbland, IndieWire, 10 Oct. 2026

Definition of insane

Adjective

Richard Dawkins, the British evolutionary theorist and author of the groundbreaking best seller The Selfish Gene (1976), among many other books, appears to have gone a bit mad.

— James Gleick, The New York Review of Books, 17 Oct. 2026
Mel Brooks’ comedy The Producers also took a poke at that mad man with Springtime for Hitler.

— Angie Martoccio, Rolling Stone, 15 Oct. 2026

Definition of mad

Adjective

Rihanna’s here, maniacal crowds are lining up outside shows to screech and wave at their favorite stars and days of runway events big and small lie ahead.

— Leah Dolan, CNN Money, 30 Sep. 2026
These machines—the maniacal Maverick R, with its praying mantis-like front suspension, and the hard-working Pioneer—have little else in common.

— Caleb Jacobs, The Drive, 2 Sep. 2026

Definition of maniacal

Adjective

Women naturally store less creatine than men, and during perimenopause and menopause, declining estrogen can take a toll on both muscle health and mental clarity.

— Maggie Ryan, Flow Space, 15 Oct. 2026
Steeped in therapy culture and financial literacy content, young Americans are fluent in boundary-setting and open to frank conversations about money and mental load.

— Grace Kelleher, Los Angeles Times, 15 Oct. 2026

Definition of mental

Browse Nearby Words

demeans

demented

dementedness

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“Demented.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/demented. Accessed 21 Oct. 2026.

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Synonyms of demented

adjective

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