border

form the boundary of; be contiguous to

a strip forming the outer edge of something

“the rug had a wide blue border”

lie adjacent to another or share a boundary

extend on all sides of simultaneously; encircle

a decorative recessed or relieved surface on an edge

provide with a border or edge

a line that indicates a boundary

enclose in or as if in a frame

the boundary of a surface

the boundary line or the area immediately inside the boundary