According to Wikipedia, http://en.wikipedia.org/wiki/Corner A corner is the place where two lines of different dimensions meet at an angle, and a concave corner of intersecting walls is generally thought to be the least beneficial position to be in a life-or-death situation. From this notion was born the verb to corner, which is used to mean "To back (another person or animal) into a corner" and usually also carries a connotation of foul play.
A Metes and bounds deed begins at a corner marked by a monument and follows a line a given direction and distance to another corner marked by another monument following around and defining the boundary lines of a property. Typically, unless otherwise described or noted, a property corner is placed on the centerline dividing two parcels of land but on the extreme limit of any structure or building located on the boundaries of the property.
In square dance, corner refers to the person you are adjacent to who is not your partner. In standa