What does the word lunatic mean?

Usage examples for lunatic

  1. " No one but a born lunatic would do a thing like that. – The Lamp in the Desert by Ethel M. Dell
  2. This was not the tree at which he had the poor lunatic flogged, for he says that was in the street. – Chapters in the History of the Insane in the British Isles by Daniel Hack Tuke
  3. It had served no other purpose than to lead the penitential lunatic to Craig Farm. – Kenny by Leona Dalrymple