Fidelity \Fi*del"i*ty\, n. [L. fidelitas: cf. F. fid['e]lit['e]. See Fealty.]

Faithfulness; adherence to right; careful and exact observance of duty, or discharge of obligations. Especially:
   (a) Adherence to a person or party to which one is bound; loyalty.

Whose courageous fidelity was proof to all danger. --Macaulay.

The best security for the fidelity of men is to make interest coincide with duty. --A. Hamilton.
   (b) Adherence to the marriage contract.
   (c) Adherence to truth; veracity; honesty.

The principal thing required in a witness is fidelity. --Hooker.

Syn: Faithfulness; honesty; integrity; faith; loyalty; fealty.

Source: Webster's Revised Unabridged Dictionary (1913)