What does the word exhaustion mean?

Usage examples for exhaustion

  1. I don't know that ever before or since in my life have I felt such exhaustion. – The Dark Forest by Hugh Walpole
  2. He was sick from his wounds, sick from exhaustion, sick for the desperate need of tsith. – One Purple Hope! by Henry Hasse
  3. The victim is released by exhaustion. – Is The Bible Worth Reading And Other Essays by Lemuel K. Washburn