Fidelity is a notion that at its most abstract level implies a truthful connection to a source or sources. Its original meaning dealt with loyalty and attentiveness to one's duty to a lord or a king, in a broader sense than the related concept of "fealty". Both derive from the Latin word "fidelitas", meaning "faithfulness."

In modern human relationships, the term can refer to sexual monogamy. In western culture this often means adherence to marriage vows, or of promises of exclusivity or monogamy, and an absence of adultery. However, some people do not equate fidelity in personal relationships with sexual or emotional monogamy. (For example, see polyamory and Open marriage.)

Fidelity also denotes how accurate a copy is to its source. For example, a worn gramophone record will have a lower fidelity than one in good condition, and a recording made by a low budget record company in the early 20th century is likely to have significantly less audio fidelity than a good modern recording. In the 1950s, the terms "high fidelity" or "hi-fi" were popularized for equipment and recordings designed for more accurate sound reproduction, while "lo-fi" music aims for "authenticity" over perfect production. Similarly in electronics, fidelity refers to the correspondence of the output signal to the input signal, rather than sound.

In the fields of scientific modelling and simulation, fidelity refers to the degree to which a model or simulation reproduces the state and behaviour of a real world object, feature or condition. Fidelity is therefore a measure of the realism of a model or simulation [cite web|url=|title=SISO-REF-002-1999: Fidelity Implementation Study Group Report] . Simulation fidelity has also been described in the past as 'degree of similarity' [cite book |author=Hays, R. |coauthors=Singer, M. |title=Simulation fidelity in training system design: Bridging the gap between reality and training |publisher=Springer-Verlag |year=1989|isbn=] .

The computer age has spawned the term Wi-Fi in reference to certain groups of wireless electronic devices. While the term Wi-Fi has been popularly taken to be an abbreviation of 'wireless fidelity', Wi-Fi is in fact a commercial brand owned by the Wi-Fi Alliance, and has little to do with fidelity as a concept.


Wikimedia Foundation. 2010.


Look at other dictionaries:

  • Fidelity — Investments Fidelity Investissements SAS est le leader mondial indépendant de la gestion d actifs pour compte de tiers. C est une compagnie privée qui possède également beaucoup d entreprises : une chaîne d autobus, une chaîne d agence d… …   Wikipédia en Français

  • fidelity — fidelity, allegiance, fealty, loyalty, devotion, piety denote faithfulness to something to which one is bound by a pledge or duty. Fidelity implies strict adherence to what is a matter of faith or of keeping faith; it presupposes an obligation,… …   New Dictionary of Synonyms

  • Fidelity — steht für: Fidelity Investments, einem US amerikanischen Unternehmen Orte in den Vereinigten Staaten: Fidelity (Illinois) Fidelity (Kansas) Fidelity (Kentucky) Fidelity (Missouri) Fidelity Township, Jersey County, Illinois Siehe auch: Fidelity… …   Deutsch Wikipedia

  • Fidelity — Fidelity, IL U.S. village in Illinois Population (2000): 105 Housing Units (2000): 44 Land area (2000): 0.111560 sq. miles (0.288938 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.111560 sq. miles (0.288938… …   StarDict's U.S. Gazetteer Places

  • fidelity — fi·del·i·ty /fə de lə tē, fī / n: the quality or state of being faithful or loyal; esp: loyalty to one s spouse in refraining from adultery and sometimes in submitting to a spouse s reasonable sexual desires Merriam Webster’s Dictionary of Law.… …   Law dictionary

  • Fidelity — Fi*del i*ty, n. [L. fidelitas: cf. F. fid[ e]lit[ e]. See {Fealty}.] Faithfulness; adherence to right; careful and exact observance of duty, or discharge of obligations. Especially: (a) Adherence to a person or party to which one is bound;… …   The Collaborative International Dictionary of English

  • fidelity — UK US /fɪˈdeləti/ noun [U] ► loyalty to a person or organization: »Customer trust and fidelity are not acquired once and for all. »They recently began testing a fidelity card scheme in Scotland prior to a national launch …   Financial and business terms

  • Fidelity, IL — U.S. village in Illinois Population (2000): 105 Housing Units (2000): 44 Land area (2000): 0.111560 sq. miles (0.288938 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.111560 sq. miles (0.288938 sq. km) FIPS… …   StarDict's U.S. Gazetteer Places

  • Fidelity, MO — U.S. town in Missouri Population (2000): 252 Housing Units (2000): 106 Land area (2000): 0.967454 sq. miles (2.505695 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.967454 sq. miles (2.505695 sq. km) FIPS… …   StarDict's U.S. Gazetteer Places

  • fidelity — [n1] faithfulness in a relationship allegiance, ardor, attachment, constancy, dependability, devotedness, devotion, faith, fealty, integrity, loyalty, piety, reliability, staunchness, steadfastness, true heartedness, trustworthiness; concepts… …   New thesaurus

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.