- a line joining points of equal elevation on a surface.
- the representation of such a line on a map.
- Mathematics. a line parallel to a trace.Compare trace1(def 11).
Origin of contour line
Examples from the Web for contour line
Historical Examples of contour line
It follows the 600-feet contour-line and winds 211 therefore exactly round the outline of the hill.
It ran straight along the 300-feet contour-line, and took the southern edge of a wood called Brockham Warren.
The contour-line of 0, or datum level, is the coastal boundary of any land form.
- a line on a map or chart joining points of equal height or depthOften shortened to: contour
- A line on a map joining points of equal elevation above a given level, usually mean sea level.♦ The change in elevation between one contour line and the next is the contour interval.