Contour vs Delineate - What's the difference?

As a noun contour

is an outline, boundary or border, usually of curved shape.

to sketch out, draw or trace an outline.

(en noun)

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.

* (speech sound) diphthong, contour tone, affricate

(delineat)

To sketch out, draw or trace an outline.

To depict, represent with pictures.

To describe or depict with words or gestures.

To outline or mark out.

* (to mark the limits or boundaries) (l), (l), (l)

* (l) * (l) * (l)

* * ----