border

The line or frontier area separating political or geographical regions.

The outer edge of something.

A decorative strip around the edge of something.

A strip of ground in which ornamental plants are grown.

(Britain, uncountable) border morris or border dancing; a vigorous style of traditional English dance originating from villages along the border between England and Wales, performed by a team of dancers usually with their faces disguised with black makeup.

(computing) A string that is both a prefix and a suffix of another particular string.