Definition of dementia in English:


Syllabification: de·men·tia
Pronunciation: /diˈmenSHə


  • 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.
    More example sentences
    • People with dementia have a degenerative disease of the brain for which there is no cure.
    • They support people with conditions such as dementia and Alzheimer's disease.
    • Early-stage dementia or Alzheimer's disease may be associated with gluten antibodies.


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

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