The definition of a boundary is a line or something else that marks a limit or border.
A margin of superiority; an advantage:
The districts surrounding a town or city; suburbs or outskirts
(Mil.) A small group stationed at a distance from the main force in order to prevent an enemy surprise attack
The downtown section of a city or town
An edge or a part near an edge; margin; side
Find another word for outskirts. In this page you can discover 13 synonyms, antonyms, idiomatic expressions, and related words for outskirts, like: suburbs, limits, boundary, edge, environs, fringes, limit, outpost, purlieus, sticks and center.