The outer edge means the furthest most point from the center. The outer edge is usually the end of the object before the dropping off point.
The outer boundary of the square meter area - the "edge".
The leading edge
Radius is from the center of a circle to the outer edge. Diameter is from the outer edge to the opposite outer edge, i.e., through the center. The diameter has twice the length of the radius.
The out edge of a cup is called the 'Rim'.
The outer edge of a circle is called the circumference.
brim
brim
It is the circle's circumference
circumference
Asters
Perimeter
If you apply force to the outer edge of the door, this gives you the most leverage.