noun. The difference in latitude between two positions as a result of a movement to the south.

noun. Progress toward the south.

noun. In surveying and in navigation, the linear distance measured in a north and south direction from the northerly end of a line to the true east and west line or the parallel of latitude passing through the southerly end of the line. Geometrically the southing or the northing of a line is equal to its east and west projection on to a meridian. The southing of a line thus is equal to its northing, and the former or the latter will be used solely in accordance with the direction of real or imaginary motion along the line.

noun. Tendency or motion to the south.

noun. In astronomy, the transit of the moon or a star across the meridian of a place.

noun. In navigation, the difference of latitude made by a ship in sailing to the southward.

noun. Tendency or progress southward.

noun. The time at which the moon, or other heavenly body, passes the meridian of a place.

noun. Distance of any heavenly body south of the equator; south declination; south latitude.

noun. Distance southward from any point departure or of reckoning, measured on a meridian; -- opposed to northing.

noun. A distance traveled southward.

noun. The time when the moon souths.

"How it came to me I know not -- call it an inspiration if you will; but the thought arose in me: if southing is latitude, why isn't westing longitude?"

northing  

south