Main Entry: de·men·tia

Pronunciation: \di-ˈmen(t)-shə, -shē-ə\

Function: noun

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

Date: 1806

1 : a usually progressive condition (as Alzheimer's disease) marked by deteriorated cognitive functioning often with emotional apathy
2 : madness, insanity <a fanaticism bordering on dementia>

— de·men·tial \-shəl\ adjective