|Noah Webster's Dictionary|
(a.) Insane; mad; of unsound mind.
Demented (1 Occurrence)
Hosea 9:7 The days of visitation have come. The days of reckoning have come. Israel will consider the prophet to be a fool, and the man who is inspired to be insane, because of the abundance of your sins, and because your hostility is great. (See NAS)