n.1 (often foll. by to) faithfulness, loyalty.
2 strict conformity to truth or fact.
3 exact correspondence to the original.
4 precision in reproduction of sound (high fidelity).
Phrases and idioms:
fidelity insurance insurance taken out by an employer against losses incurred through an employee's dishonesty etc.
Etymology: F fid{eacute}lit{eacute} or L fidelitas (as FEALTY)