Fidelity is defined as being loyal or faithful, or an accurate copy.
(noun)See fidelity in Webster's New World College Dictionary
noun pl. fidelities
Origin: ME fidelite < OFr < L fidelitas < fidelis, faithful, trusty < fides, faith
See fidelity in American Heritage Dictionary 4
noun pl. fi·del·i·ties
Origin:
Origin: Middle English fidelite
Origin: , from Old French
Origin: , from Latin fidēlitās
Origin: , from fidēlis, faithful
Origin: , from fidēs, faith; see bheidh- in Indo-European roots
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