fidelity

American  

[fi-del-i-tee, fahy-] / fɪˈdɛl ɪ ti, faɪ- /

noun

• fidelities
  plural

1. strict observance of promises, duties, etc..

   a servant's fidelity.

2. loyalty.

   fidelity to one's country.

   Antonyms:

   disloyalty

3. conjugal faithfulness.

4. adherence to fact or detail.

5. accuracy; exactness.

   The speech was transcribed with great fidelity.

   Synonyms:

   rigor, faithfulness, precision

6. Audio, Video. the degree of accuracy with which sound or images are recorded or reproduced.

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fidelity British  

/ fɪˈdɛlɪtɪ /

noun

1. devotion to duties, obligations, etc; faithfulness

2. loyalty or devotion, as to a person or cause

3. faithfulness to one's spouse, lover, etc

4. adherence to truth; accuracy in reporting detail

5. electronics the degree to which the output of a system, such as an amplifier or radio, accurately reproduces the characteristics of the input signal See also high fidelity

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Synonym Usage

See loyalty.

Other Word Forms

Derived Forms

• nonfidelity
  noun
• unfidelity
  noun

Inflected Forms

Nouns

• fidelities
  plural

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Etymology

Origin of fidelity

First recorded in 1500–10; late Middle English fidelite (from Middle French ), from Latin fidēlitās, equivalent to fidēli- (stem of fidēlis “loyal,” equivalent to fidē(s) faith + -lis adjective suffix) + -tās -ty ²

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Explanation

Fidelity is the quality of being faithful or loyal. Dogs are famous for their fidelity. Fidelity comes from the Latin root fides, which means faith, so fidelity is the state of being faithful. Marital fidelity is faithfulness to your spouse. If you're a journalist, your reports should have fidelity to the facts. Someone without fidelity to a religion or group belief is called an infidel.

Example Sentences

See Examples For:

fidelity fidelities

In chemistry research, for instance, the current level of fidelity will allow for algorithms that can make predictions about simple molecules.

From The Wall Street Journal ● Oct. 19, 2026

"Alas," she continued, confirming her fidelity as tears appeared in eyes around the table: "It may mean I am not a phenomenal actor."

From BBC ● Oct. 9, 2026

I once thought fidelity meant staying inside the life Tony and I had built together.

From Los Angeles Times ● Oct. 9, 2026

The team also measured the fidelity of the entangled measurement.

From Science Daily ● Sep. 29, 2026

Pairs used to maintain the fidelity and fixity of information.

From "The Gene" by Siddhartha Mukherjee

"Neutral atoms are the most scalable type of quantum computer, but they didn't have high-entanglement fidelities until now," says Shaw.

From Science Daily ● Oct. 11, 2023

Furthermore, pushing the fidelities far beyond this threshold reduces the overhead needed to implement error correcting codes.

From Science Daily ● Sep. 25, 2023

In laboratory experiments, trapped ions have reached fidelities as high as 99.99%, according to a spokesperson for the company.

From Scientific American ● Feb. 13, 2023

Shallow quantum circuits need higher gate fidelities and more stability to limit decoherence.

From Nature ● Mar. 2, 2017

OD prepares us for the greater crusades by more commonplace fidelities.

From My Daily Meditation for the Circling Year by John Henry Jowett

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Related Words

• devotion
• loyalty

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