The Collaborative International Dictionary of English v.0.48:

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.
       [1913 Webster]

             Whose courageous fidelity was proof to all danger.
                                                  --Macaulay.
       [1913 Webster]

             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.
       [1913 Webster]

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

   Syn: Faithfulness; honesty; integrity; faith; loyalty;
        fealty.
        [1913 Webster]

The Devil's Dictionary (1881-1906):

FIDELITY, n.  A virtue peculiar to those who are about to be betrayed.


U.S. Gazetteer (1990):

Fidelity, IL (village, FIPS 25960)
  Location: 39.15459 N, 90.16350 W
  Population (1990): 66 (27 housing units)
  Area: 0.3 sq km (land), 0.0 sq km (water)
  Zip code(s): 62030
Fidelity, MO (town, FIPS 24112)
  Location: 37.08201 N, 94.30947 W
  Population (1990): 235 (98 housing units)
  Area: 2.5 sq km (land), 0.0 sq km (water)

Moby Thesaurus II by Grady Ward, 1.0:

130 Moby Thesaurus words for "fidelity":
   abandon, absoluteness, accuracy, adherence, adhesion, allegiance,
   application, ardency, ardor, assiduity, assiduousness, attachment,
   attention to fact, bona fides, bond, bonne foi, bulldog tenacity,
   care for truth, commitment, committedness, concentration,
   constancy, correctness, dedication, delicacy, dependability,
   devotedness, devotion, devoutness, diligence, dogged perseverance,
   doggedness, earnestness, endurance, engrossment, exactitude,
   exactness, faith, faithfulness, faultlessness, fealty, fervency,
   fervidness, fervor, fineness, fire, firmness, flawlessness,
   good faith, heartiness, heat, heatedness, homage, impassionedness,
   indefatigability, industriousness, industry, insistence,
   insistency, intensity, intentness, literalism, literality,
   literalness, loyalty, mathematical precision, meticulousness,
   niceness, nicety, obstinacy, passion, passionateness, patience,
   patience of Job, perfection, permanence, perseverance, persistence,
   persistency, pertinaciousness, pertinacity, piety, plodding,
   plugging, preciseness, precision, preoccupation, refinement,
   relentlessness, reliability, resolution, right, rightness,
   rigidity, rigor, rigorousness, sedulity, sedulousness, seriousness,
   severity, sincerity, single-mindedness, singleness of purpose,
   slogging, spirit, stability, stamina, staunchness, staying power,
   steadfastness, steadiness, stick-to-itiveness, strictness,
   stubbornness, subtlety, tenaciousness, tenacity, textualism,
   the letter, tie, tirelessness, troth, true blue, trueness,
   trustworthiness, unremittingness, unswerving attention, vehemence,
   warmth, zeal