witness mark n.— «We took a cursory glance around for the drill hole (witness mark) without results. The boulders previously lining the east side of the road seem to have been either replaced or built into a more solid stone wall. Several...
DNF adj. 1. did not finish, in course-based sporting events, such as boating, auto-racing, and horse-racing. 2. did not find, in geocaching. (source: Double-Tongued Dictionary)