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The definition of unfaithful

5 Definitions of: unfaithful

    1. adjective, not true to a promise, vow, etc
    2. adjective, not true to a wife, husband, lover, etc, esp in having sexual intercourse with someone else
    3. adjective, inaccurate; inexact; unreliable; untrustworthy
    4. adjective, not having religious faith; infidel
    5. adjective, not upright; dishonest
    6. Show me some examples of this word: unfaithful
    7. Show me the etymology of the word: unfaithful

From Collins