If something is shorn, it's trimmed, clipped, or shaved. A shorn sheep is considerably less fluffy than one that isn't shorn.
If your brother gets his curls closely cropped, you can describe him as shorn, and you can also say your weedy front lawn is shorn once you've barreled through it with a lawnmower. This adjective, however, is most often applied to wooly animals. Shorn sheep may look cold and skinny, but thoughtful shearers won't leave them in this state during the chilly months.