Wordnet 3.0
NOUN (2)
1. 
 an arm of the South Pacific to the southwest of the Bismarck Archipelago; 
2. 
 a naval battle in World War II; 
 Allied land-based bombers destroyed a Japanese convoy in the Bismarck Sea in March 1943; 
[syn: Bismarck Sea, battle of the Bismarck Sea]
WordNet (r) 3.0 (2006):
Bismarck Sea
    n 1: an arm of the South Pacific to the southwest of the
         Bismarck Archipelago
    2: a naval battle in World War II; Allied land-based bombers
       destroyed a Japanese convoy in the Bismarck Sea in March 1943
       [syn: Bismarck Sea, battle of the Bismarck Sea]