FA'ITHLESS, adjective 1. Without belief in the revealed truths of religion; unbelieving. O faithless generation. Math 18. 2. Not believing; not giving credit to. 3. Not adhering to allegiance or duty; disloyal; perfidious; treacherous; as a faithless subject. 4. Not true to a master or employer; neglectful; as a faithless servant. 5. Not true to the marriage covenant; false; as a faithless husband or wife. 6. Not observant of promises. 7. Deceptive. Yonder faithless phantom.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI