Fidelity is the quality of being faithful or loyal. Its original meaning regarded duty in a broader sense than the related concept of fealty. Both derive from the Latin word fidēlis, meaning "faithful or loyal". In the City of London financial markets it has traditionally been used in the sense encompassed in the motto "My word is my bond".
Fidelity also denotes how accurately a copy reproduces 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 which exhibited more accurate sound reproduction. The converse term "lo-fi", does not necessarily mean "low fidelity", rather that the production ethic aims for "gritty authenticity" over perfect production. Similarly in electronics, fidelity refers to the correspondence of the output signal to the input signal, rather than sound quality, as in the popular internet connection technology "Wi-Fi".
Fidelity, now defunct, was an organization within the Anglican Church of Canada committed to retaining traditional understanding of human sexuality within that church. It was opposed to, but in dialogue with, Integrity Canada.
Fidelity (French: La fidélité) is a 2000 French drama film written and directed by Andrzej Żuławski and starring Sophie Marceau, Pascal Greggory, and Guillaume Canet. Based on Madame de La Fayette's seventeenth century novel La Princesse de Clèves, the film is about a talented photographer who lands a lucrative job in Paris with a scandal-mongering tabloid and becomes romantically involved with an eccentric children's book publisher while resisting the sexual advances of another photographer. Filmed on location in Paris, Fidelity received the Cabourg Romantic Film Festival Award for Best Actress (Sophie Marceau) and the Golden Swann Award (Andrzej Zulawski).
Talented Canadian photographer Clélia (Sophie Marceau) lands a lucrative job in Paris with a tabloid called La Verite run by scandal-mongerer Rupert MacRoi (Michel Subor). Clélia's mother once dated MacRoi years ago while working as a caberet singer. Once she became pregnant with Clélia, she stopped seeing MacRoi and married Clélia's father. Accompanying her daughter to Paris, she tells Clélia that her strongest principle was honour, and encourages her to get married and settle down.