fidelity

fi·del·i·ty  (f-dl-t, f-)

n. pl. fi·del·i·ties

1. Faithfulness to obligations, duties, or observances.

2. Exact correspondence with fact or with a given quality, condition, or event; accuracy.

3. The degree to which an electronic system accurately reproduces the sound or image of its input signal.

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[Middle English fidelite, from Old French, from Latin fidlits, from fidlis, faithful, from fids, faith; see bheidh- in Indo-European roots.]

Synonyms: fidelity, allegiance, fealty, loyalty
These nouns denote faithfulness. Fidelity implies the unfailing fulfillment of one's duties and obligations and strict adherence to vows or promises: fidelity to one's spouse.
Allegiance is faithfulness considered as a duty: "I know no South, no North, no East, no West, to which I owe any allegiance.... The Union, Sir, is my country" Henry Clay.
Fealty, once applied to the obligation of a tenant or vassal to a feudal lord, now suggests faithfulness that one has pledged to uphold: swore fealty to the laws of that country.
Loyalty implies a steadfast and devoted attachment that is not easily turned aside: loyalty to an oath; loyalty to one's family.

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fidelity

Noun

pl -ties

1. faithfulness to one's spouse or lover

2. loyalty to a person, belief, or cause

3. accuracy in reporting detail: an account of the invasion written with objectivity and fidelity

4. Electronics the degree to which an amplifier or radio accurately reproduces the input signal [Latin fides faith]

Thesaurus

Noun	1.	fidelity - accuracy with which an electronic system reproduces the sound or image of its input signal accuracy, truth - the quality of being near to the true value; "he was beginning to doubt the accuracy of his compass"; "the lawyer questioned the truth of my account"
	2.	fidelity - the quality of being faithful faithfulness quality - an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare constancy - faithfulness and dependability in personal attachments (especially sexual fidelity) dedication - complete and wholehearted fidelity loyalty, trueness - the quality of being loyal infidelity, unfaithfulness - the quality of being unfaithful

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fidelity

noun 1. loyalty, faith, integrity, devotion, allegiance, constancy, faithfulness, dependability, trustworthiness, troth (archaic) fealty, staunchness, devotedness, lealty (archaic), Scot. true-heartedness << OPPOSITE disloyalty

noun 2. accuracy, precision, correspondence, closeness, adherence, faithfulness, exactitude, exactness, scrupulousness, preciseness << OPPOSITE inaccuracy

Translations

fidelity [fɪˈdɛlɪtɪ] n → fidelidad f

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fidelity [fɪˈdɛlɪtɪ] n → fidélité f

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fidelity [fɪˈdɛlɪtɪ] n → Treue f;

(accuracy) → Genauigkeit f

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fidelity [fɪˈdɛlɪtɪ] n → fedeltà (= accuracy); esattezza