Dictionary and Thesaurus

Definition of Unfaithful

• (a.) Not faithful; not observant of promises, vows, allegiance, or duty; violating trust or confidence; treacherous; perfidious; as, an unfaithful subject; an unfaithful agent or servant.
• (a.) Not possessing faith; infidel.

Synonyms of Unfaithful

• Faithless
• Traitorous
• Treasonable
• Treasonous

Antonyms of Unfaithful

• Faithful
• Faithful

Homophones of Unfaithful