Fidelity

//fɪˈdɛl.ɪ.ti// noun

noun ·Common ·High school level

Definitions

Noun
  1. 1
    Faithfulness to one's moral or civic duties. countable, uncountable

    "the fidelity of the civil servants"

  2. 2
    accuracy with which an electronic system reproduces the sound or image of its input signal wordnet
  3. 3
    Loyalty to one's spouse or partner, including abstention from cheating or extramarital affairs. countable, uncountable
  4. 4
    the quality of being faithful wordnet
  5. 5
    Accuracy, or exact correspondence to some given quality or fact. countable, uncountable
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  1. 6
    The degree to which a system accurately reproduces an input. countable, uncountable

    "By placing them closer to the source, we can reduce the number of messages in the system and this in turn is likely to improve the fidelity of the system."

  2. 7
    Faithfulness to God and one's religion. archaic, countable, uncountable

    "Near-synonym: faith"

Synonyms

All synonyms
abandonabsolutenessaccuracyadherenceadhesionallegiance

Example

More examples

"Histories are more full of Examples of the Fidelity of dogs than of Friends."

Etymology

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

Related phrases

fidelity bondfidelity cardfidelity insurancehigh fidelitylow fidelityno fidelitywireless fidelity

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.