Boundary Noun Synonyms
border(s), limit(s), frontier(s), bound(s), confines, perimeter
If you cross that boundary, you will be safely in Switzerland.
Search Google for Boundary:
Science / Biology / Divergent Plate Boundary: The boundary between two tectonic plates that are moving apart. MORE
Science / Chemistry / Phase Boundary: A phase boundary is a surface where two samples of matter with different properties are in contact. The surface of a gas bubble in water or the surface of a crystal are examples of phase boundaries. MORE
Science / Tides and Currents / Coastal Boundary: The mean high water line (MHWL) or mean higher high water line (MHHWL) when tidal lines are used as the coastal boundary. Also, lines used as boundaries inland of and measured from (or points thereon) MORE
Science / Tides and Currents / Marine Boundary: The mean lower low water line (MLLWL) when used as a boundary. Also, lines used as boundaries seaward of and measured from (or points thereon) the MLLWL. See coastal boundary. MORE
Science / Biology / Convergent Plate Boundary: The boundary between two plates that are moving toward one another. MORE
Technology / Aviation / Boundary Layer: the layer of air immediately adjacent to the surface of an airfoil. Its flow, rather than being laminar, is essentially random, or circulatory, and produces a great deal of aerodynamic drag. MORE