Boundary may refer to:
  • Border
    Borders define geographic boundaries of political entities or legal jurisdictions, such as governments, sovereign states, federated states and other subnational entities. Some borders—such as a state's internal administrative borders, or inter-state borders within the Schengen Area—are open and...

  • in psychology
    Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

    • Personal boundaries
      Personal boundaries
      Personal boundaries are guidelines, rules or limits that a person creates to identify for him- or herself what are reasonable, safe and permissible ways for other people to behave around him or her and how he or she will respond when someone steps outside those limits.'Personal boundaries define...

  • in mathematics
    Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...

    • Boundary (topology)
      Boundary (topology)
      In topology and mathematics in general, the boundary of a subset S of a topological space X is the set of points which can be approached both from S and from the outside of S. More precisely, it is the set of points in the closure of S, not belonging to the interior of S. An element of the boundary...

      , 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 value problem
      Boundary value problem
      In mathematics, in the field of differential equations, a boundary value problem is a differential equation together with a set of additional restraints, called the boundary conditions...

      , a differential equation together with a set of additional restraints called the boundary conditions
    • Boundary (thermodynamic), the edge of a thermodynamic system across which heat, mass, or work can flow
  • in other fields
    • Boundaries in landscape history
      Boundaries in landscape history
      Boundaries—particularly field boundaries—are among the oldest features in an English rural landscape. Although a boundary itself is an abstract concept, the boundary can often be seen by differences in land use on either side.-Longevity of boundaries:...

      , the divide between areas of differing land use
    • Boundary (real estate)
      Boundary (real estate)
      A unit of real estate or immovable property is limited by a legal boundary. The boundary may appear as a discontinuation in the terrain: a ditch, a bank, a hedge, a wall, or similar, but essentially, a legal boundary is a conceptual entity, a social construct, adjunct to the likewise abstract...

      , the legal boundary between units of real property
    • Boundary (cricket)
      Boundary (cricket)
      Boundary has two distinct meanings in the sport of cricket:# the edge or boundary of the playing field, and# a manner of scoring runs.-Edge of the field:...

      , the edge of the playing field, or a scoring shot where the ball is hit to or beyond that point
    • Boundaries (television), a 2008 television series
    • Boundary critique
      Boundary critique
      Boundary critique is the concept in critical systems thinking, according to Ulrich that states that "both the meaning and the validity of professional propositions always depend on boundary judgments as to what 'facts' and 'norms' are to be considered relevant" or not.Boundary critique is a...

      , a concept about the meaning and validity of propositions
  • Place names
    • Boundary, Derbyshire
      Boundary, Derbyshire
      Boundary is a civil parish and hamlet in South Derbyshire.It is near Smisby and near the Leicestershire border and the town of Ashby de la Zouch.-Early history:...

      , a civil parish and hamlet in South Derbyshire, England
    • Boundary, Leicestershire
      Boundary, Leicestershire
      Boundary is a village in Leicestershire, England....

      , a village in Leicestershire, England
    • Boundary, Staffordshire
      Boundary, Staffordshire
      Boundary is a village in Staffordshire, England....

      , a village in Staffordshire, England
    • Boundary Ranges
      Boundary Ranges
      The Boundary Ranges, also known in the singular and as the Alaska Boundary Range, are the largest and most northerly subrange of the Coast Mountains...

      , also known as the Boundary Range, a mountain range in British Columbia, Canada and Alaska, United States
    • Boundary Country
      Boundary Country
      The Boundary Country is a historical designation for a district in southern British Columbia lying, as its name suggests, along the boundary between Canada and the United States. It lies to the east of the southern Okanagan Valley and to the west of the West Kootenay. It is often included in...

      , a region of southern British Columbia, Canada
      • Kootenay Boundary Regional District, a regional district in British Columbia
      • West Kootenay-Boundary
        West Kootenay-Boundary
        West Kootenay-Boundary was a provincial electoral district for the Legislative Assembly of British Columbia, Canada from 2001 to 2009.The seat combined the Rossland/Trail/Castlegar area that had previously been in Rossland-Trail with the Boundary Country, which had been in the Okanagan-Boundary...

        , a provincial electoral district in British Columbia
      • Okanagan-Boundary
        Okanagan-Boundary was a provincial electoral district in the Canadian province of British Columbia spanning the area from the Similkameen towns of Kaleden and Keremeos to Grand Forks and Christina Lake, and including the southern Okanagan towns of Okanagan Falls, Oliver, Osoyoos, Rock Creek and...

        , a former provincial electoral district in British Columbia
      • Boundary-Similkameen
        Boundary-Similkameen is a new riding which was formed in 2008 assembled together with populations of Penticton-Okanagan Valley, West Kootenay-Boundary and Yale-Lillooet...

        , a former provincial electoral district in British Columbia
    • Boundary Falls, British Columbia
      Boundary Falls, British Columbia
      Boundary Falls is a locality in the Boundary Country of the Southern Interior of British Columbia, south of the city of Greenwood and west of the city of Grand Forks, British Columbia....

      , also known as Boundary, a former railway town in the Boundary Country of British Columbia
    • Stikine, British Columbia
      Stikine, British Columbia
      Stikine, also known formerly as Boundary, is an unincorporated locality and former customs post on the Stikine River, located on the Canadian side of the British Columbia-Alaska boundary on the Stikine River's west bank. The customs post was seasonal and operated in the summer months only...

      , called Boundary from 1930 to 1964, a former customs post on the Stikine River at the Alaska-British Columbia border

Ships, a number of ships with this name
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