noun
fidelity
fih-DEHL-ih-tee
noun
1
Faithfulness or loyalty, especially to a spouse or partner.
"They exchanged vows promising lifelong fidelity."
2
Accuracy in reproducing something, such as sound or an original source.
"The remastered recording has much higher audio fidelity."
How to Use Fidelity
Learner’s notesIn plain EnglishLoyalty and faithfulness, or (in tech) how accurately something reproduces the original.
Common pairings
marital fidelity
high fidelity
fidelity to the source material
Word Forms
fidelities plural
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They exchanged vows promising lifelong _____.
Etymology
From Middle French fidélité, from Latin fidēlitās, from fidēlis ("faithful"), from fidēs ("faith, trust") — a doublet of fealty.