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Definition of dementia noun from the Oxford Advanced Learner's Dictionary

dementia

noun
 
/dɪˈmenʃə/
 
/dɪˈmenʃə/
[uncountable]
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  1. a brain condition, mostly affecting older people, in which a person has difficulties with memory, thinking, control of the body, etc. that are severe enough to affect daily life
    • patients with dementia
    • She was diagnosed with dementia.
    • a dementia patient
    • 111 people in the study subsequently developed dementia.
    • The staff have specialist training in dementia care.
    compare Alzheimer’s see also vascular dementiaTopics Life stagesc2, Health problemsc2
    Word Originlate 18th cent.: from Latin, from demens, dement- ‘out of one's mind’.
See dementia in the Oxford Advanced American DictionarySee dementia in the Oxford Learner's Dictionary of Academic English

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