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Definition of demented

demented

/dɪˈmɛn.tɪd/
de · ment · ed
Adverb:dementedly
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demented Lexical Profile

demented Game Scores & Validity

• adjective

1

Behaving in a wildly irrational, erratic, or unhinged manner, often due to extreme anger, distress, or excitement.

Example

"The fans went completely demented with excitement when the band finally walked onto the stage."

2

Suffering from dementia or severe cognitive impairment (now dated in clinical use).

Example

"The historical medical records described the elderly patient as frail and severely demented."

Synonyms
View all synonyms for demented
Antonyms
View all antonyms for demented

Word Nuance & Usage

While historically used in medicine to describe someone affected by dementia, in modern usage it is almost exclusively an informal, pejorative adjective meaning wildly irrational or crazy; clinical contexts now prefer phrases such as 'living with dementia'.

• Rhymes for demented

• Nearby Words

demeaning
demeaningly
demeanor
demented
dementedly
dementia
demerara

Word Origin & Etymology

First recorded in the mid-17th century, derived from the Latin verb 'dementare' (to drive mad), formed from 'de-' (out of) and 'mens' (mind).

Cite this Entry

Wordmom. (2026). Definition of Demented. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/demented
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