Definition - unfaithful

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unfaithful
  1. not true to duty or obligation or promises; "an unfaithful lover"
  2. having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend; "her husband was unfaithful"
  3. having the character of, or characteristic of, a traitor; "the faithless Benedict Arnold"; "a lying traitorous insurrectionist"
  4. DISLOYAL
  5. not trustworthy; "an unfaithful reproduction"

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