Fidelity

n.resilient, thoughtfulformal

Meaning 1

Steady loyalty to a person, duty, or principle.

Reach for it when praising constancy when a commitment is tested over time

Her fidelity to the cooperative's mission guided every difficult decision.

everyday
loyalty
allegiance to a person or group is the plain meaning
not when Loyalty can persist from habit rather than principled faithfulness.
warm
devotion
affection and personal dedication motivate the commitment
not when Devotion is more emotional than fidelity to a procedure.
formal
faithfulness
reliable observance of a bond or promise is central
not when Faithfulness may carry religious or marital associations.
literary
steadfastness
pressure fails to weaken adherence
not when Steadfastness can concern resolve without any relationship.

Accuracy with which a copy, account, or signal preserves its original.

Reach for it when judging how truthfully a reproduction retains important detail

The recording captured the old piano with remarkable fidelity.

everyday
faithful reproduction
the copy retains the original's essential qualities
not when A reproduction may be faithful without high technical resolution.
professional
accuracy
correct detail matters more than overall resemblance
not when Accuracy can preserve facts while losing tone or character.
professional
signal quality
technical clarity in transmission is being measured
not when Signal quality includes noise and strength beyond fidelity alone.

fidelity to principle
Fidelity to principle kept the mediator from accepting favors.
high fidelity
High fidelity lets listeners hear the room around the quartet.
historical fidelity
The costume balances historical fidelity with safe movement.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.