Boundary

Boundary or Boundaries may refer to:

• Border, in political geography

• Boundaries (2016 film), a 2016 Canadian film
• Boundaries (2018 film), a 2018 American-Canadian road trip film
• 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 video game set in outre space

• 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

• 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

• 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

• , 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
• Boundary, software for secure remote access to systems based on trusted identity developed by HashiCorp

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