When a corner is cut off and flattened out to make a beveled edge.
To trim square edges to a 45 degree diagonal, usually to eliminate splintering and unsightly edges
A bevelled surface at corner or edge.
The decorative quality of posts may be increased by cutting off a small portion of the square corner leaving an angled (beveled) surface. The chamfer cut extends through much of the length of the posts but stops short of the ends.
Grinding a secondary flat surface on a corner, creating a beveled edge. Commonly done to the edges of a knife's handle or the inside radius of a hole making a smoother contact spot for hand/fingers.