DNS stands for Did Not Start, the result recorded when a registered runner never begins the race. It's different from a DNF, where the runner starts but doesn't finish. Injury, illness, and travel issues are the most common causes.
It stands for Did Not Start. The runner registered and got a bib but never crossed the start line on race day.
The usual reasons are injury, illness, or a training setback close to race day that makes starting unsafe. Travel problems or a last-minute personal emergency can also cause a DNS.
Almost never in full, most race organizers state entry fees are non-refundable in their terms. Some events offer deferral to next year's race or a partial credit instead.
No, since you never started, there's no time or split data attached to your name. It simply appears as DNS in the results list instead of a finish time.
It's closely related. Withdrawing usually means telling the organizer in advance, while DNS is the label applied in results when a registered runner doesn't show up to start.