faith /feɪθ/noun 5exclamation 1forms 1phrases 1 noun5 •strong trust in someone or something because of what they have done in the pastThe faithfulness of Old Faithful gives us faith in it.I have faith in the goodness of my fellow man. •A conviction about abstractions, ideas, or beliefs, without empirical evidence, experience, or observation.I have faith that my prayers will be answered.I have faith in the healing power of crystals. •A religious or spiritual belief system.The Christian faith.We seek justice for the Indo-European Folk Faith; what's wrong in our literature for that? •An obligation of loyalty or fidelity and the observance of such an obligation.He acted in good faith to restore broken diplomatic ties after defeating the incumbent. •(no longer used) Credibility or truth. exclamation1 •(no longer used) Ellipsis of by my faith. formsfaiths Phrases with faith take on faithTo accept something without seeing evidence supporting it, by trust or confidence.