fidelity.
Often followed by to or towards: faithfulness or loyalty towards a person, a group, one's civic or moral duties, etc.; allegiance; (countable) an instance of this.
Meaning & usage
Often followed by to or towards: faithfulness or loyalty towards a person, a group, one's civic or moral duties, etc.; allegiance; (countable) an instance of this.
the fidelity of the civil servants to their country
Often followed by to or towards: faithfulness or loyalty towards a person, a group, one's civic or moral duties, etc.; allegiance; (countable) an instance of this. Faithfulness or loyalty to one's partner or spouse, including restraint from romantic or sexual relationships with third parties.
Often followed by to or towards: faithfulness or loyalty towards a person, a group, one's civic or moral duties, etc.; allegiance; (countable) an instance of this. Faithfulness to God and one's religion.
Accuracy, or exact correspondence, to some given fact or quality; exactness.
The closeness of association between an organism and a plant community.
Chiefly in high fidelity, low fidelity, etc.: the degree to which a system accurately reproduces an input such as an image or sound.
In by one's fidelity, to break fidelity, to give fidelity, etc.: one's pledge or promise to act in good faith; an oath, a word of honour.
Of a person: honesty, trustworthiness; (countable) an instance of this.
Where this word comes from
From Late Middle English fidelite (“allegiance, fealty; faithfulness, trust; agreement made in good faith”), from Old French fidélité (“faithfulness, fidelity”) (modern French fidélité), from Latin fidēlitās (“faithfulness, fidelity”), from fidēlis (“dependable, trustworthy; faithful, loyal”) + -tās (suffix forming feminine abstract nouns denoting a state of being). Fidēlis is derived from fidēs (“belief, faith; confidence, trust; loyalty, fidelity; etc.”) (from Proto-Indo-European *bʰidʰ-, the zero-grade of *bʰeydʰ- (“to convince; to trust”) (whence English bide)) + -ēlis (a variant of -ālis (suffix forming adjectives of relationship)). Doublet of fealty.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.