noun de·men·tia \di-ˈmen(t)-shə, -shē-ə\

medical : a mental illness that causes someone to be unable to think clearly or to understand what is real and what is not real

Full Definition of DEMENTIA

:  a usually progressive condition (as Alzheimer's disease) marked by deteriorated cognitive functioning often with emotional apathy
:  madness, insanity <a fanaticism bordering on dementia>
de·men·tial \-shəl\ adjective

Examples of DEMENTIA

  1. This patient suffers from dementia.
  2. a new study on age-related dementias

Origin of DEMENTIA

Latin, from dement-, demens mad, from de- + ment-, mens mind — more at mind
First Known Use: 1806

Other Psychology Terms

fetish, hypochondria, intelligence, mania, narcissism, neurosis, pathological, psychosis, schadenfreude, subliminal
Medical Dictionary


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)
de·men·tial \-chəl\ adjective


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