lijn

Lijn is a Dutch noun with several related meanings, generally referring to something long, narrow, and continuous. It is used in mathematics and everyday language to describe a mark or path, as well as to denote cords, routes, and sequences. The word appears in contexts ranging from geometry to transportation and data representation, and its exact sense depends on the domain.

In geometry and mathematics, a lijn denotes a straight line, an infinite one-dimensional figure consisting of points extending in opposite directions. A line segment is a finite part of a line. Lines can be described by equations, slopes, or angles, and they may be parallel, intersecting, or perpendicular to each other.

In everyday use, lijn can refer to physical cords or ropes, such as a fishing line (vislijn) or a clothesline (waslijn). In nautical or industrial contexts, lines may refer to rigging, cables, or pull lines used to move or secure objects. The concept of a line also appears in phrases describing rope-like systems or boundaries.

In transport and infrastructure, een lijn is a route served by vehicles or services, for example a buslijn, tramlijn, or spoorlijn. This sense covers both the physical track or guideway and the service network that operates along that route, as well as the timetable associated with it.

In data visualization and computing, lijn is used for lines in charts (lijndiagram) or as a general reference to a line in text or code. However, for lines of text, the term regel is more common in everyday language.

Etymologically, lijn has cognates in related Germanic languages and derives from an old term meaning line, thread, or rope. It remains a versatile word in Dutch, used across technical and everyday contexts to express continuity and connection.