faithfulness vs fidelity what difference

what is difference between faithfulness and fidelity



From Middle English feithfulnesse, equivalent to faithful +‎ -ness.


faithfulness (countable and uncountable, plural faithfulnesses)

  1. The state of being faithful
    Synonyms: allegiance, loyalty, fidelity




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.


  • IPA(key): /fɪˈdɛl.ɪ.ti/, /faɪˈdɛl.ɪ.ti/


fidelity (countable and uncountable, plural fidelities)

  1. Faithfulness to one’s duties.
  2. Loyalty to one’s spouse or partner, including abstention from cheating or extramarital affairs.
  3. Accuracy, or exact correspondence to some given quality or fact.
  4. The degree to which a system accurately reproduces an input.
    • 2003, Proceedings of the Twenty-ninth International Conference on Very Large Databases, Berlin, Germany, 9-12 September, 2003, page 58:
      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.


  • 2004, High-Fidelity Medical Imaging Displays (Aldo Badano, Michael J. Flynn, Jerzy Kanicki, →ISBN
  • 2008, David L. Nelson, Michael M. Cox, Absolute Ultimate Guide for Lehninger Principles of Biochemistry →ISBN, page S-305:
    The isoleucyl-tRNA synthetase has a proofreading function that ensures the fidelity of the aminoacylation reaction, but the histidyl-tRNA synthetase lacks such a proofreading function.


  • infidelity

Derived terms

  • fidelitous
  • fidelity bond
  • high fidelity

Related terms

  • affidavit
  • bide
  • faith


Further reading

  • fidelity in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
  • fidelity in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

Please follow and like us:

Leave a Reply

Your email address will not be published. Required fields are marked *

Social Share Buttons and Icons powered by Ultimatelysocial