Source : Webster's Revised Unabridged Dictionary (1913)

Savanna \Sa*van"na\, n. [Of American Indian origin; cf. Sp.
   sabana, F. savane.]
   A tract of level land covered with the vegetable growth
   usually found in a damp soil and warm climate, -- as grass or
   reeds, -- but destitute of trees. [Spelt also {savannah}.]

         Savannahs are clear pieces of land without woods.
                                                  --Dampier.

   {Savanna flower} (Bot.), a West Indian name for several
      climbing apocyneous plants of the genus {Echites}.

   {Savanna sparrow} (Zo["o]l.), an American sparrow
      ({Ammodramus sandwichensis} or {Passerculus savanna}) of
      which several varieties are found on grassy plains from
      Alaska to the Eastern United States.

   {Savanna wattle} (Bot.), a name of two West Indian trees of
      the genus {Citharexylum}.

Source : WordNet®

Savannah
     n 1: a port in eastern Georgia near the mouth of the Savannah
          river
     2: a river in South Carolina that flows southeast to the
        Atlantic [syn: {Savannah River}]
     3: a flat grassland in tropical or subtropical regions [syn: {savanna}]