n. 25B6; noun
the boundary between Israel and Jordan : BORDER, frontier, borderline, partition.
the boundary between art and advertising : DIVIDING LINE, divide, division, borderline, cut-off point.
the boundary of his estate : BOUNDS, confines, limits, margins, edges, fringes; border, periphery, perimeter.
the boundaries of accepted behaviour : LIMITS, parameters, bounds, confines; ambit, compass.