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dementia

Pronunciation: /dɪˈmɛnʃə/
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Definition of dementia

noun

[mass noun] Medicine
  • a chronic or persistent disorder of the mental processes caused by brain disease or injury and marked by memory disorders, personality changes, and impaired reasoning.

Origin:

late 18th century: from Latin, from demens, dement- 'out of one's mind'

dementia in other Oxford dictionaries

Definition of dementia in the US English dictionary
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