demarcation

A demarcation is a line, boundary, or other conceptual separation between things. Geographically, a demarcation might be the border that separates two countries or the river that divides two regions.

Demarcation comes from the German word for mark. Although it's often used as a term regarding geographical borders and boundaries, it can also be used to describe lines between categories or groups. For example, a definite demarcation exists between people who love the Boston Red Sox and those who love the New York Yankees.

Definitions of demarcation
  1. noun
    the boundary of a specific area
    synonyms: demarcation line, limit
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    types:
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    edge
    the outside limit of an object or area or surface; a place farthest away from the center of something
    city limit, city limits
    the limits of the area occupied by a city or town
    upper limit
    the limit on the upper (or northernmost) side of something
    lower limit
    the limit on the lower (or southernmost) side of something
    three-mile limit
    the limit of a nation's territorial waters
    border
    a strip forming the outer edge of something
    hem
    the edge of a piece of cloth; especially the finished edge that has been doubled under and stitched down
    luff
    (nautical) the forward edge of a fore-and-aft sail that is next to the mast
    border, molding, moulding
    a decorative recessed or relieved surface on an edge
    selvage, selvedge
    the edge of a fabric that is woven so that it will not ravel or fray
    berm, shoulder
    a narrow edge of land (usually unpaved) along the side of a road
    roadside, wayside
    edge of a way or road or path
    type of:
    bound, boundary, bounds
    the line or plane indicating the limit or extent of something
  2. noun
    a conceptual separation or distinction
    synonyms: contrast, dividing line, line
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    types:
    Rubicon, point of no return
    a line that when crossed permits of no return and typically results in irrevocable commitment
    type of:
    differentiation, distinction
    a discrimination between things as different and distinct
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