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English definition of “fidelity”

fidelity

noun [U] uk   /fɪˈdel.ə.ti/ us    /-t̬i/

fidelity noun [U] (LOYALTY)

formal honest or lasting support, or loyalty, especially to a sexual partner: Somerset Maugham's comedy of marital fidelity, 'The Constant Wife' How important do you think sexual fidelity is in a marriage?

fidelity noun [U] (EXACT COPY)

approving the degree to which the detail and quality of an original, such as a picture, sound, or story, is copied exactly: The best ink-jet printers can reproduce photographs with amazing fidelity.
(Definition of fidelity from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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