line The shortest distance between any two points in Euclidean space. A line is implicitly a straight line; the alternative is a curve. Mathematically, a line may be determined by the presence of any two points in an n-dimensional space (where n is two or more). A line segment is a piece of a line with definite endpoints. Related category GEOMETRY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |