dementia

noun de·men·tia \ di-ˈmen(t)-shə , -shē-ə \
Updated on: 19 May 2018

Definition of dementia

1 : a usually progressive condition (such as Alzheimer's disease) marked by the development of multiple cognitive deficits (such as memory impairment, aphasia, and the inability to plan and initiate complex behavior)
  • dementia is diagnosed only when both memory and another cognitive function are each affected severely enough to interfere with a person's ability to carry out routine daily activities.
  • The Journal of the American Medical Association
2 : madness, insanity
  • a fanaticism bordering on dementia

demential

play \-shəl\ adjective

Examples of dementia in a Sentence

  1. This patient suffers from dementia.

  2. a new study on age-related dementias

Recent Examples of dementia from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dementia.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of dementia

Latin, from dement-, demens mad, from de- + ment-, mens mind — more at mind


Medical Dictionary

dementia

noun de·men·tia \ di-ˈmen-chə \

medical Definition of dementia

: a usually progressive condition (as Alzheimer's disease) marked by the development of multiple cognitive deficits (as memory impairment, aphasia, and inability to plan and initiate complex behavior)

demential

play \-chəl\ adjective


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