Outrounding
The outermost edge encompassing any entity.
Jason: Amy, why are you coloring only outside the lines?
Amy: Because I think it is unfair that the outrounding of a picture is often neglected.
Jason: Oh! Then I am going to shade in my whole picture, including the outrounding, with pencil!
Amy: Because I think it is unfair that the outrounding of a picture is often neglected.
Jason: Oh! Then I am going to shade in my whole picture, including the outrounding, with pencil!