confidence or trust in a person or thing: faith in another's ability.

belief that is not based on proof: He had faith that the hypothesis would be substantiated by fact.

belief in God or in the doctrines or teachings of religion: the firm faith of the Pilgrims.

belief in anything, as a code of ethics, standards of merit, etc.: to be of the same faith with someone concerning honesty.

a system of religious belief: the Christian faith; the Jewish faith.