a mathematical system for representing three-dimensional objects and space on a two-dimensional surface by means of intersecting lines that are drawn vertically and horizontally and that radiate from one point (one-point perspective), two points (two-point perspective), or several points on a horizon line as perceived by a viewer imagined in an arbitrarily fixed position.

British Dictionary definitions for one-point perspective

linear perspective

noun

the branch of perspective in which the apparent size and shape of objects and their position with respect to foreground and background are established by actual or suggested lines converging on the horizon