Definition of dementia in English:


Line breaks: de|men¦tia
Pronunciation: /dɪˈmɛnʃə


[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.
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'.

Definition of dementia in: