dimensioner

Dimensioner is the plural of dimension in Swedish, Norwegian, and Danish, and is used to describe measurable extents in space or objects. In English, the corresponding term is dimensions. In science, engineering, and data analysis, dimensions refer to the axes or measures used to describe size, position, or duration.

In geometry, objects are described by dimensions—the number of independent directions needed to specify a point. A line is one-dimensional, a plane two-dimensional, and ordinary space three-dimensional. Some theories propose higher dimensions, such as four-dimensional spacetime in relativity, or abstract n-dimensional spaces in mathematics.

Dimension is closely tied to units and measurements. In the International System of Units (SI), base dimensions include length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity. Quantities built from these bases have dimensional formulas, and calculations must preserve dimensional consistency. Some quantities are dimensionless.

In data science and information systems, a dimension often refers to a variable or feature. A dataset with many features is high-dimensional, which can complicate analysis and modeling. Dimensionality reduction techniques, such as principal component analysis or t-SNE, reduce the number of dimensions while preserving structure.

In technical drawing and manufacturing, a dimension is a numerical value that defines size, location, or tolerance of a feature. Dimensioning uses lines and symbols to communicate requirements in blueprints, following standards from ISO or ASME.