Wordnet 3.0
NOUN (1)
1. 
 the second largest of the four main islands of Japan; 
 to the north of Honshu; 
[syn: Hokkaido, Ezo, Yezo]
WordNet (r) 3.0 (2006):
Ezo
    n 1: the second largest of the four main islands of Japan; to
         the north of Honshu [syn: Hokkaido, Ezo, Yezo]