Faith  n.  1 confidence or trust in a person or thing….  2. belief which is not based on proof… 3. belief in God or in the doctrines or teachings of religion…. 4. belief in anything, as a code of ethics, standards of merit…. 5. a system of religious belief…. 6. the obligation of loyalty or fidelity to a person, promise, engagement, etc…. 7. the observance of this obligation; fidelity to one’s promise, oath, allegiance, etc.:  to act in good faith.  8 Christian Theology, the trust in God and in His promises as made through Christ by which man is justified or saved.  9 in faith, in truth; indeed.

—– Random House Dictionary of the English Language: The Unabridged Edition 1967.