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Definition of fidelity noun from the Oxford Advanced American Dictionary

     

    fidelity

     noun
    noun
    NAmE//fɪˈdɛlət̮i//
     
    [uncountable]
     
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  1. 1fidelity (to something) (formal) the quality of being loyal to someone or something fidelity to your principles
  2. 2fidelity (to somebody) the quality of being faithful to your husband, wife, or partner by not having a sexual relationship with anyone else marital/sexual fidelity opposite infidelity
  3. 3fidelity (of something) (to something) (formal) the quality of being accurate the fidelity of the translation to the original text see high fidelity
See fidelity in the Oxford Advanced Learner's Dictionary
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