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1
the quality of showing loyalty and faithfulness to someone or something
- He admired the dog's fidelity to its owner.
- The marriage was marked by mutual fidelity and trust.
- They valued his fidelity to the team's goals.
- The artist's work demonstrated a fidelity to traditional techniques.
- Her fidelity to the company was evident in her dedication to every project.
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2
accuracy with which a copy or reproduction matches the original
- The recording had remarkable fidelity to the live performance.
- High‑fidelity speakers reproduce sound with minimal distortion.
- The model's fidelity impressed the engineers.
- The translation maintained fidelity to the author's style.
- The replica's fidelity fooled even experts.