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contour noun

  /-tɔː(ɹ)/ , /ˈkɒntʊə(ɹ)/
  • An outline, boundary or border, usually of curved shape.
  • A line on a map or chart delineating those points which have the same altitude or other plotted quantity: a contour line or isopleth; (metonymically) the landform or its surface.
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