What does the word sanity mean?

Usage examples for sanity

  1. Carne looked at his excellent uncle as if he had much doubt about his sanity. – Springhaven A Tale of the Great War by R. D. Blackmore
  2. His excited vehemence had gone and there was nothing in his voice or demeanour inconsistent with normal sanity. – Mysterious Mr. Sabin by E. Phillips Oppenheim
  3. Locke assured her that he hoped soon to lay hands on the antidote that would restore Brent to health and sanity, and begged Eva to be brave in the mean time. – The Master Mystery by Arthur B. Reeve and John W. Grey