1. The quality of being faithful
   "His fidelity to his wife was never in question";
   - faithfulness
    
2. Accuracy with which an electronic system reproduces the sound or image of its input signal
   "The high fidelity of the audio system made listeners feel as if they were at a live concert"

Derived forms: fidelities

See also: faithful, unfaithful

Type of: accuracy, quality, truth, veracity

Antonym: unfaithfulness

Encyclopedia: Fidelity, MO