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fidelity (n.)
early 15c., "faithfulness, devotion," from Old French fidélité (15c.), from Latin fidelitatem (nominative fidelitas) "faithfulness, adherence, trustiness," from fidelis "faithful, true, trusty, sincere," from fides "faith" (from PIE root *bheidh- "to trust, confide, persuade"). From 1530s as "faithful adherence to truth or reality;" specifically of sound reproduction from 1878.
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Definitions of fidelity from WordNet
Dictionary entries near fidelity
fiddle-faddle
fiddle-head
fiddler
fiddlestick
fideism
fidelity
fidget
fidgety
fiducial
fiduciary
fie