boundary line
Where territories meet
A boundary line is the edge or border that separates one area from another—between properties, territories, or jurisdictions: The surveyor marked the boundary line between the two farms.
In sports, boundary lines define the playing area; crossing them puts the ball or player out of bounds.
Often shortened to just boundary or line.
- borderOuter edge or limit
- edgeBoundary or sharpness
- frontierEdge of settlement
- border crossingTransit between sovereign territories
- thresholdPoint of beginning
divide · demarcation · fence · wall · limit · perimeter · margin · horizon · crossing · territory · surveyor · property · marker · stake · treaty · disputed · drawn · invisible
- court linesbaseline, sideline, service box, tramline
- bordersborder, border crossing, national borders, international borders, border markers
- edgesedge, top edge, bottom edge, border, brim
- linesdotted, dashed, curved, straight, wavy
- soccer pitchtouchline, penalty area, penalty box, center circle, goal area
- boundariesborders, border, edges, edge, limits
containment function
boundary lineopen space
Unobstructed outdoor area
common ground · overlap · intersection · no man's land · buffer zone
boundary, line, bound, bounds, bounded, bounding, boundless, boundlessness, lines