Wordnet 3.0
NOUN (2)
1. 
 a continent in the western hemisphere connected to North America by the Isthmus of Panama; 
2. 
 the nations of the South American continent collectively; 
- Example: "South America is an important market for goods from the United States"
WordNet (r) 3.0 (2006):
South America
    n 1: a continent in the western hemisphere connected to North
         America by the Isthmus of Panama
    2: the nations of the South American continent collectively;
       "South America is an important market for goods from the
       United States"