adjective

demented

dih-MEHN-tihd

Demented (adjective) means Affected by dementia, or more informally, behaving in a wild or unhinged way. Example: “Her demented grandfather no longer recognised the house.”

adjective

Affected by dementia, or more informally, behaving in a wild or unhinged way.

"Her demented grandfather no longer recognised the house."

"The film has a demented sense of humour that some viewers love."

How to use demented

Learner’s notes

In plain EnglishEither clinically affected by dementia, or, informally, wildly irrational or crazy.

When to use it

The clinical sense is neutral and medical; the informal "crazy/wild" sense is casual and can sound flippant if used about real illness.

Word forms

more demented comparative, most demented superlative

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Her _____ grandfather no longer recognised the house.

Rhymes for demented

vented dented scented talented invented oriented lamented patented cemented fermented contented consented

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Frequently asked questions

What does “demented” mean?

The word “demented” means affected by dementia, or more informally, behaving in a wild or unhinged way. In plain terms, either clinically affected by dementia, or, informally, wildly irrational or crazy.

How do you pronounce “demented”?

“Demented” is pronounced dih-MEHN-tihd (/dɪˈmɛntɪd/ in IPA).

How do you use “demented” in a sentence?

Here is “demented” used in a sentence: “Her demented grandfather no longer recognised the house.”

What part of speech is “demented”?

“Demented” is an adjective.