The meaning of DEMENTED is exhibiting madness : marked by thought or action that lacks reason —not used technically. How to use demented in a sentence.

DEMENTED definition: crazy; insane; mad. See examples of demented used in a sentence.

DEMENTED definition: 1. unable to think or act clearly because you are extremely worried, angry, or excited by…. Learn more.

Definition of demented adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

demented, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary

If you describe someone as demented, you think that their actions are strange, foolish, or uncontrolled.

Define demented. demented synonyms, demented pronunciation, demented translation, English dictionary definition of demented. adj. 1. Suffering from dementia. 2. Informal Crazy or foolish. …

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demented (adjective) demented /dɪ ˈ mɛntəd/ adjective Britannica Dictionary definition of DEMENTED [more demented; most demented] : not able to think clearly or to understand what is real and what is …

Dec 14, 2025 · demented (comparative more demented, superlative most demented) Insane; mentally ill. quotations