Fidelity definition

fĭ-dĕlĭ-tē, fī-
Frequency:
Faithful devotion to duty or to one's obligations or vows; loyalty; faithfulness.
noun
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Fidelity is defined as being loyal or faithful, or an accurate copy.

When a worker is unfailingly loyal to a company, this is an example of fidelity.

When a man and a wife are faithful to each other and do not have extramarital sex, this is an example of fidelity.

When a document is copied exactly, this is an example of fidelity.

noun
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The degree to which an electronic system accurately reproduces the sound or image of its input signal.
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Faithfulness to obligations, duties, or observances.
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The condition or behavior of engaging in sex only with one's spouse or only with one's partner in a sexual relationship.
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Accuracy of a description, translation, etc. or of the reproduction of sound, an image, etc.
noun
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The extent to which an electronic device or process faithfully reproduces audio or visual information. Hi-fi, for example, is high fidelity.
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The fidelity of the civil servants.

noun
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Loyalty to one's spouse or partner, including abstention from extramarital affairs (except in an open marriage).
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Accuracy, or exact correspondence to some given quality or fact.
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The degree to which a system accurately reproduces an input.
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Exact correspondence with fact or with a given quality, condition, or event; accuracy.

The fidelity of the movie to the book.

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Other Word Forms

Noun

Singular:
fidelity
Plural:
fidelities

Origin of fidelity

  • Middle English fidelite from Old French from Latin fidēlitās from fidēlis faithful from fidēs faith bheidh- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • 15th century, from Middle French fidélité, from Latin fidēlitās, from fidēlis (“faithful”), from fidēs (“faith, loyalty”) (English faith), from Proto-Indo-European *bʰidʰ-, zero-grade of Proto-Indo-European *bʰeydʰ- (“to command, to persuade, to trust”) (English bide).

    From Wiktionary