| Boundary Waters' vessels |
| (In astronomy) notional boundary of a black hole — viz not hereon (anag) |
| Common property boundary |
| It may be a boundary between neighboring countries ... or what each set of circles depicts? |
| Outer boundary |
| Boundary |
| Boundary marker on a musical staff |
| Ancient boundary between Romans and Carthaginians |
| Imaginary boundary for the South Frigid Zone |
| Boundary marker |
| Abbr. on a city boundary sign |
| Air-mass boundary |
| Country's boundary |
| Racetrack boundary |
| ___ line (court boundary) |
| Boundary imposed on Poland in 1944 |
| Boundary of a black hole |
| Water boundary |
| Lagoon's boundary |
| Lane boundary |
| Track boundary |
| Boundary between Earth and Hades |
| Attack, as across a boundary |
| Northern boundary of the South Frigid Zone |
| ____ of the Andes: boundary marker |
| Brazilian boundary river |
| Frigid Zone boundary |
| Pool table boundary |
| St. with an arc-shaped northern boundary |
| Billiards boundary |