Definition of fidelity
- his fidelity to his wife
- The movie's director insisted on total fidelity to the book.
Theme music by Joshua Stamper ©2006 New Jerusalem Music/ASCAP
music with much higher fidelity than on cassettes
they have never wavered in their fidelity to the cause of freedom
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fidelity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
You can have faith in "fidelity," which has existed in English since the 15th century; its etymological path winds back through Middle English and Middle French, eventually arriving at the Latin verb fidere, meaning "to trust." "Fidere" is also an ancestor of other English words associated with trust or faith, such as "fiduciary" (which means "of, relating to, or involving a confidence or trust" and is often used in the context of a monetary trust) and "confide" (meaning "to trust" or "to show trust by imparting secrets"). Nowadays "fidelity" is often used in reference to recording and broadcast devices, conveying the idea that a broadcast or recording is "faithful" to the live sound or picture that it reproduces.
: the quality of being faithful to your husband, wife, or sexual partner
: the quality of being faithful or loyal to a country, organization, etc.
: the degree to which something matches or copies something else
What made you want to look up fidelity? Please tell us where you read or heard it (including the quote, if possible).
subject to rapid or unexpected change
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