GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   Dement , v. t. [L. dementare, fr. demens, -mentis, out of one's mind, mad; de + mens mind. See Mental, and cf. Dementate.] To deprive of reason; to make mad. [R.]
   Bale.
   
   1913 Webster
         
       

2.       
   Dement, a. [L. demens, - mentis.] Demented; dementate. [R.]
   J. H. Newman.
   
   1913 Webster