Reorientation is the act of figuring out again where you are in relationship to your environment, or changing direction. If you're lost in the woods, a compass and map are good for reorientation.
Reorientation is often related to location: figuring out where you are and pointing yourself in the right direction. A football player who gets spun around on the field may need a quick reorientation so he doesn't run the wrong way. But reorientation is also about rethinking, and maybe changing, the way you approach something, like an idea or a project.