Boundary or Boundaries may refer to:

  • Border, in political geography

Entertainment

  • Boundaries (2016 film), a Canadian film
  • Boundaries (2018 film), an American-Canadian road trip film
  • Boundaries (band), an American metalcore band
  • Boundary (cricket), the edge of the playing field, or a scoring shot where the ball is hit to or beyond that point
  • Boundary (sports), the sidelines of a field
  • Boundary (video game), a defunct 2023 multiplayer online game set in outer space

Mathematics and physics

  • Boundary (topology), the closure minus the interior of a subset of a topological space; an edge in the topology of manifolds, as in the case of a 'manifold with boundary'
  • boundary of a manifold with boundary.
  • Boundary (graph theory), the vertices of edges between a subgraph and the rest of a graph
  • Boundary (chain complex), its abstractization in chain complexes
  • Boundary value problem, a differential equation together with a set of additional restraints called the boundary conditions
  • Boundary (thermodynamics), the edge of a thermodynamic system across which heat, mass, or work can flow

Psychology and sociology

  • Personal boundaries, a life skill for protecting against having personal values compromised or violated
  • Boundaries of the mind, the degree of separateness between fantasy and reality
  • Professional boundaries, relationship between any professional and their client
  • Symbolic boundaries, a theory of how people form social groups proposed by cultural sociologists
  • Boundary-work, sociology of divisions between fields of knowledge

Places

  • Boundary, Derbyshire, a hamlet and former civil parish in South Derbyshire and Leicestershire, England
  • Boundary, Staffordshire, a village in Staffordshire, England
  • Boundary Ranges, also known as the Boundary Range, a mountain range in British Columbia, Canada and Alaska, United States
  • Boundary County, ID, the northernmost county in Idaho
  • Boundary Country, a region of southern British Columbia, Canada
  • Kootenay Boundary Regional District, a regional district in British Columbia
  • West Kootenay-Boundary, a provincial electoral district in British Columbia
  • Okanagan-Boundary, a former provincial electoral district in British Columbia
  • Boundary-Similkameen, a former provincial electoral district in British Columbia
  • Boundary Falls, British Columbia, also known as Boundary, a former railway town in the Boundary Country of British Columbia
  • Boundary Waters, a region on the boundary between Ontario and Minnesota
  • Stikine, British Columbia, called Boundary from 1930 to 1964, a former customs post on the Stikine River at the Alaska–British Columbia border
  • Boundary City, Indiana, a community in the United States

Other uses

  • , a number of ships with this name
  • Boundaries in landscape history, the divide between areas of differing land used
  • Boundary (real estate), the legal boundary between units of real property
  • Boundary (company), an American application performance management company
  • Boundary critique, a concept about the meaning and validity of propositions
  • Boundary turbulence, a break in expectation of how private information is held within a group of knowledge owners
  • Boundary Ale, a beer made by Moosehead Breweries
  • Geological boundary, a boundary between different geological units
  • Boundary, software for secure remote access to systems based on trusted identity developed by HashiCorp

See also

  • Boundary representation
  • Bound (disambiguation)
  • The Boundary (disambiguation)
  • Border (disambiguation)
  • Demarcation (disambiguation)