Definition of: fidelity

(fī·del′ə·tē, fə-) noun plural ·ties
1. Faithfulness in the discharge of duty or of obligation.
2. Hearty allegiance to those to whom one is bound in affection or honor; loyalty; devotion: matrimonial fidelity, fidelity to a father or friend.
3. Strict adherence to truth or fact; reliability; veracity.
4. Electronics A measure of the accuracy and freedom from distortion with which a sound–reproducing system, as radio, will receive and transmit the input signals; it may be high, medium, or low. [<F fidelité <L fidelitas, -tatis <fides faith] Synonyms: allegiance, constancy, devotion, faith, faithfulness, fealty, honesty, integrity, loyalty, truth, truthfulness. See ALLEGIANCE. Antonyms: disloyalty, infidelity, treachery, treason.