Palazzo Ducale in Venice: capital # 28 in the porch, featuring Virtues and vices - In fidelitate nulli gero (Fidelity)

Fidelity is the quality of faithfulness or loyalty. 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".

Audio and electronics

In audio, "fidelity" 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. 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".

Other Languages
العربية: وفاء
বাংলা: ফিডেলিটি
беларуская: Вернасць
български: Вярност
čeština: Věrnost
Deutsch: Treue
eesti: Truudus
español: Fidelidad
italiano: Fedeltà
português: Fidelidade
русский: Верность
తెలుగు: ఫిడిలిటీ
українська: Відданість