Contour
/-tɔː(ɹ)/
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.
A speech sound which behaves as a single segment, but which makes an internal transition from one quality, place, or manner to another.
Synonyms: contour line
verb
To form a more or less curved boundary or border upon.
To mark with contour lines.
To practise the makeup technique of contouring.