Contour /(?)/

Con·tour

Contour

n.
  1. The outline of a figure or body, or the line or lines representing such an outline; the line that bounds; periphery.
    Titian's coloring and contours.
    — A. Drummond.
  2. The outline of a horizontal section of the ground, or of works of fortification. (Mil.)

Phrases & Compounds
Contour feathers
those feathers that form the general covering of a bird.
Contour of ground
the outline of the surface of ground with respect to its undulation, etc.
Contour line
the line in which a horizontal plane intersects a portion of ground, or the corresponding line in a map or chart.