Webster's 1828 Dictionary
SOUTHING
a.Going towards the south; as the southing sun.
SOUTHING
n. 1. Tendency or motion to the south.
2. The southing of the moon, the time at which the moon passes the meridian.
3. Course or distance south; as a ship's southing.
Webster's 1913 Dictionary
SOUTHING
SOUTHING South "ing, n.
1. Tendency or progress southward; as, the southing of the sun. Emerson.
2. The time at which the moon, or other heavenly body, passes the meridian of a place.
3. (Astron.)
Defn: Distance of any heavenly body south of the equator; south declination; south latitude.
4. (Surv. & Navigation )
Defn: Distance southward from any point departure or of reckoning, measured on a meridian; -- opposed to northing.
New American Oxford Dictionary
southing
south ing |ˈsouT͟HiNG ˈsaʊðɪŋ | ▶noun distance traveled or measured southward, esp. at sea. • a figure or line representing southward distance on a map. • Astronomy the transit of a celestial object, esp. the sun, across the meridian due south of the observer. • Astronomy the angular distance of a star or other object south of the celestial equator.
Oxford Dictionary
southing
south |ing |ˈsaʊθɪŋ | ▶noun [ mass noun ] distance travelled or measured southward, especially at sea. • [ 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.
The Wordsmith Dictionary