the outside edge
outside
/ˌau̇t-ˈsīd/
noun
a place or region beyond an enclosure or boundary: such as
the world beyond the confines of an institution (such as a prison)
the world beyond the territory or state of Alaska; especially : the 48 contiguous states
adjective
of, relating to, or being on or toward the outer side or surface
of, relating to, or being on or toward the outer side of a curve or turn
of, relating to, or being on or near the outside
adverb
on or to the outside
outdoors