o·ri·en·teer·ing / ˌôriənˈti(ə)ring/ • n. a competitive sport in which participants find their way to various checkpoints across rough country with the aid of a map and compass, the winner being the one with the lowest elapsed time.

orienteering Sport similar to cross-country running but requiring both athletic and navigational skills. Runners, leaving at timed intervals, carry a map and compass with which to locate control points around the usually 10km (6.2mi) course. The fastest to complete the course wins.