Wordnet 3.0
NOUN (1)
1. 
 a wooded plateau in the Champagne-Ardenne region of France; 
 the site of intense fighting in World War I and World War II; 
The Collaborative International Dictionary of English v.0.48:
Ardennes \Ardennes\ n.
   1. a wooded plateau in the Champagne-Ardenne region of
      France; the site of intense fighting in World Wars I and
      II.
      [WordNet 1.5]
WordNet (r) 3.0 (2006):
Ardennes
    n 1: a wooded plateau in the Champagne-Ardenne region of France;
         the site of intense fighting in World War I and World War
         II