1 complete trust or confidence.
2 firm belief, esp. without logical proof.
3 a a system of religious belief (the Christian faith). b belief in religious doctrines. c spiritual apprehension of divine truth apart from proof. d things believed or to be believed.
4 duty or commitment to fulfil a trust, promise, etc. (keep faith).
5 (attrib.) concerned with a supposed ability to cure by faith rather than treatment (faith-healing).
Phrases and idioms:
bad faith intent to deceive. good faith honesty or sincerity of intention.
Etymology: ME f. AF fed f. OF feid f. L fides
Useful english dictionary. 2012.