contour (plural contours)
- An outline, boundary or border, usually of curved shape.
- The low drag contour of a modern automobile.
- A line on a map or chart delineating those points which have the same altitude or other plotted quantity: a contour line or isopleth.
- (linguistics) a speech sound which behaves as a single segment, but which makes an internal transition from one quality, place, or manner to another.
outline, boundary or border
line on a map or chart