Faithfulness; careful and exact observance of duty, or performance of obligations. We expect fidelity in a public minister, in an agent or trustee, in a domestic servant, in a friend. The best security for the fidelity of men, is to make interest coincide with duty.

Firm adherence to a person or party with which one is united, or to which one is bound; loyalty; as the fidelity of subjects to their king or government; the fidelity of a tenant or liege to his lord.

Observance of the marriage covenant; as the fidelity of a husband or wife.

Honesty; veracity; adherence to truth; as the fidelity of a witness.