n. The outline of a figure or body; the line that defines or bounds anything; the periphery considered as distinct from the object: used chiefly in speaking of rounded or sinuous bodies.n. Specifically— In the fine arts, a line or lines representing the outline of any figure.n. In fortification, the horizontal outline of works of defense. When the conformation of the ground or works is described by contours or horizontal sections, these sections are taken at some fixed vertical interval from each other suited to the scale of the drawing or the subject in hand; and the distances of the surface, at each interval, above or below some assumed plane of comparison, are given in figures at the most convenient places on the plan.n. In surveying, a curve of equal elevation on a map; a contourline.n. In mathematics, a closed curve considered as inclosing an area.To make a contour or outline of; mark with contours or contour-lines: as, contoured maps.To follow a level line on an irregular slope; imitate the path of a contour-line.