When a worker is unfailingly loyal to a company, this is an example of fidelity.
When a man and a wife are faithful to each other and do not have extramarital sex, this is an example of fidelity.
When a document is copied exactly, this is an example of fidelity.
The fidelity of the movie to the book.
Origin of fidelity
- Middle English fidelite from Old French from Latin fidēlitās from fidēlis faithful from fidēs faith bheidh- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition