devotion to duties, obligations, etc; faithfulness loyalty or devotion, as to a person or cause faithfulness to one's spouse, lover, etc adherence to truth; accuracy in reporting detail the degree to which the output of a system, such as an amplifier or radio, accurately reproduces the characteristics of the input signal
See also high fidelity
WordReference Random House Learner's Dictionary of American English © 2026
fi•del•i•ty /fɪˈdɛlɪti, faɪ-/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- loyalty:Dogs are known for their fidelity to their masters.
- faithfulness, esp. to one's spouse.
- accuracy;
exactness. - Sound Reproductionthe degree of accuracy with which sound or images are recorded or reproduced.
fi•del•i•ty
(fi del′i tē, fī-),USA pronunciation n., pl. -ties.
- strict observance of promises, duties, etc.:a servant's fidelity.
- loyalty:fidelity to one's country.
- conjugal faithfulness.
- adherence to fact or detail.
- accuracy;
exactness:The speech was transcribed with great fidelity. - Sound Reproduction, Radio and Television[Audio., Video.]the degree of accuracy with which sound or images are recorded or reproduced.
- Latin fidēlitās, equivalent. to fidēli- (stem of fidēlis loyal, equivalent. to fidē(s) faith + -lis adjective, adjectival suffix) + -tās -ty2
- Middle French)
- late Middle English fidelite (1375–1425
- 2.See corresponding entry in Unabridged See loyalty.
- 5.See corresponding entry in Unabridged precision, faithfulness, rigor, meticulousness.
- 2.See corresponding entry in Unabridged disloyalty.
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