border

A border is an edge or dividing line. (noun)

An example of a border is the outside edges of a garden bed.
An example of a border is a mat cut for a 5x7 photo to fit inside an 8x10 frame.
An example of a border is Antler, North Dakota between the US and Canada.

See border in Webster's New World College Dictionary

noun

an edge or a part near an edge; margin; side
a dividing line between two countries, states, etc. or the land along it; frontier
a narrow strip, often ornamental, along an edge; fringe; edging
an ornamental strip of flowers or shrubs along the edge of a garden, walk, etc.

transitive verb

adjective

of, forming, or near a border

See border in American Heritage Dictionary 4

(bôrˈdər)

noun

A part that forms the outer edge of something.
A decorative strip around the edge of something, such as fabric.
A strip of ground, as at the edge of a garden or walk, in which ornamental plants or shrubs are planted.
The line or frontier area separating political divisions or geographic regions; a boundary.

verb bor·dered, bor·der·ing, bor·ders

verb, transitive