fidelity.

1. Faithfulness to a person, duty, principle, or commitment.

2. The accuracy with which a copy, signal, or account preserves its source.

Use it for

Words that belong together

• fidelity to a principle
• marital fidelity

On the page

Her fidelity to the original purpose limited the available compromises.

Usage notes

Primary category: academic / formal. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: analysis, description. Commonness: moderately common.