What is the meaning of Dement?

insane, demented

An insane person, or one afflicted with dementia

To drive mad; to craze

moron (personal insult implying stupidity)

senile, demented

demented

suffering from dementia

third-person plural future active indicative of dēmō

demented, suffering from dementia

demented, suffering from dementia

demented

demented (suffering from dementia)

Source: wiktionary.org