1. Confident belief in the truth, value, or trustworthiness of a person, idea, or thing. 2. Belief that does not rest on logical proof or material evidence. See synonyms at belief. , trust. 3. Loyalty to a person or thing; allegiance: keeping faith with one's supporters.4. often FaithChristianity The theological virtue defined as secure belief in God and a trusting acceptance of God's will. 5. The body of dogma of a religion: the Muslim faith.6. A set of principles or beliefs.
IDIOM:
in faith Indeed; truly.
ETYMOLOGY:
Middle English, from Anglo-Norman fed, from Latin fids. See bheidh- in Appendix I.