%infidelity%

n.; pl. Infidelities [ L. infidelitas: cf. F. infidélité. ] [ 1913 Webster ]

1. Lack of faith or belief in some religious system; especially, a lack of faith in, or disbelief of, the inspiration of the Scriptures, of the divine origin of Christianity. [ 1913 Webster ]

There is, indeed, no doubt but that vanity is one of the principal causes of infidelity. V. Knox. [ 1913 Webster ]

2. Unfaithfulness to the marriage vow or contract; violation of the marriage covenant by adultery. [ 1913 Webster ]

3. Breach of trust; unfaithfulness to a charge, or to moral obligation; treachery; deceit; as, the infidelity of a servant. “The infidelity of friends.” Sir W. Temple. [ 1913 Webster ]