distance travelled or measured southward, especially at sea:the object of all vessels using this route is to get sufficient southing off the coast to beat around the Horn despite the violent winds
[count noun] a figure or line representing southward distance on a map.
Astronomy the transit of a celestial object, especially the sun, across the meridian due south of the observer.
[count noun] Astronomy the angular distance of a star or other object south of the celestial equator.
southing in other Oxford dictionaries
Definition of southing in the US English dictionary
