What does unfaithful mean?
• UNFAITHFUL (adjective) The adjective UNFAITHFUL has 4 senses: 1. not true to duty or obligation or promises 2. having sexual relations with someone other than your husband or wife, or your boyfriend or girlfriend 3. having the character of, or characteristic of, a traitor 4. not trustworthy Familiarity information: UNFAITHFUL used as an adjective is uncommon.