An example of persistence is when you try and try to learn a new skill, never giving up.
An example of persistence is when a marital problem doesn't go away even after the divorce is finalized.
Persistence of vision.
Persistence of vision causes visual impressions to continue upon the retina for a brief time.
Once written to a disk file, the data has persistence: it will still be there tomorrow when we run the next program.
You've got to admire his persistence, he's asked her out every day for a month even though she keeps turning him down.