The Collaborative International Dictionary of English v.0.48:

South \South\ (?; by sailors sou), n. [OE. south, su[thorn], AS.
   s[=u][eth] for sun[eth]; akin to D. zuid, OHG. sund, G.
   s["u]d, s["u]den, Icel. su[eth]r, sunnr, Dan. syd, s["o]nden,
   Sw. syd, s["o]der, sunnan; all probably akin to E. sun,
   meaning, the side towards the sun. [root]297. See Sun.]
   1. That one of the four cardinal points directly opposite to
      the north; the region or direction to the right or
      direction to the right of a person who faces the east.
      [1913 Webster]

   2. A country, region, or place situated farther to the south
      than another; the southern section of a country. "The
      queen of the south." --Matt. xii. 42.
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   3. Specifically: That part of the United States which is
      south of Mason and Dixon's line. See under Line.
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   4. The wind from the south. [Obs.] --Shak.
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The Collaborative International Dictionary of English v.0.48:

South \South\, a.
   Lying toward the south; situated at the south, or in a
   southern direction from the point of observation or
   reckoning; proceeding toward the south, or coming from the
   south; blowing from the south; southern; as, the south pole.
   "At the south entry." --Shak.
   [1913 Webster]

   South-Sea tea (Bot.) See Yaupon.
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The Collaborative International Dictionary of English v.0.48:

South \South\, adv.
   1. Toward the south; southward.
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   2. From the south; as, the wind blows south. --Bacon.
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The Collaborative International Dictionary of English v.0.48:

South \South\, v. i. [imp. & p. p. Southed; p. pr. & vb. n.
   Southing.]
   1. To turn or move toward the south; to veer toward the
      south.
      [1913 Webster]

   2. (Astron.) To come to the meridian; to cross the north and
      south line; -- said chiefly of the moon; as, the moon
      souths at nine.
      [1913 Webster]

WordNet (r) 3.0 (2006):

south
    adv 1: in a southern direction; "we moved south" [syn: south,
           to the south, in the south]
    adj 1: situated in or facing or moving toward or coming from the
           south; "the south entrance" [ant: north]
    n 1: the region of the United States lying to the south of the
         Mason-Dixon line
    2: the southern states that seceded from the United States in
       1861 [syn: Confederacy, Confederate States, Confederate
       States of America, South, Dixie, Dixieland]
    3: the cardinal compass point that is at 180 degrees [syn:
       south, due south, southward, S]
    4: a location in the southern part of a country, region, or city
    5: the direction corresponding to the southward cardinal compass
       point