Full of faith; having faith; believing.Firm in faith; full of loyalty and fidelity; true and constant in affection or allegiance to a person to whom one is bound, or in the performance of duties or services; exact in attending to commands: as, a faithful subject; a faithful servant; a faithful husband or wife.Observant of compacts, treaties, contracts, vows, or other engagements; true to one's word: as, a government faithful to its treaties; faithful to one's word.Trust worthy; true; exact; conforming to the letter and spirit; conformable to truth or to a prototype: as, a faithful execution of a will; a faithful narrative; a faithful likeness.True; worthy of belief; truthful: as, a faithful witness.Synonyms Truthful, careful, trusty, trustworthy, stanch, incorruptible, reliable.Close, strict, accurate, conscientious.n. A faithful person.n. Among Mohammedans, the true believers: hence the calif is called “Commander of the Faithful.”n. In political use, the general body of unquestioning adherents of a party: used in contempt by members of other parties.