What does the word unfaithful mean?

Usage examples for unfaithful

  1. An unfaithful treatment will only make the evil worse, the burden heavier. – The Indian Question (1874) by Francis A. Walker
  2. I understand now the novels about unfaithful wives, and all that kind of thing. – Will Warburton by George Gissing
  3. For her sake, I am unfaithful to them, I enter her chamber at night by the window, which I climb up to when all are asleep. – French and Oriental Love in a Harem by Mario Uchard