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Webster's Dictionary (1865)

Con-tour', n.

noun

(kon-to͝or'), n. [Fr. contour, It. & Sp. contorno, from con and tour, torno, Pr. torn, turn, lathe, from Lat. tornus, Gr. τόρνος, lathe]

  1. The line that bounds, defines, or terminates a figure; outline; periphery. Johnson.
  2. (Mil.) The horizontal outline of ground or works of fortification.

Contour of ground (Surv.), the form of the surface of ground with respect to its undulations, &c.—Line of contour (Topographical Surv.), the line in which a horizontal plane intersects a portion of ground.