Wordnet 3.0
NOUN (1)
1. 
 a naval battle in the Spanish-American War (1898); 
 the American fleet under Admiral Dewey defeated the Spanish fleet; 
The Collaborative International Dictionary of English v.0.48:
manila bay \manila bay\ n.
   The name of a naval battle in the Spanish-American War
   (1898), in which the American fleet under Admiral Dewey
   defeated the Spanish fleet off the shore of Manila in the
   Phillipines.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
Manila Bay
    n 1: a naval battle in the Spanish-American War (1898); the
         American fleet under Admiral Dewey defeated the Spanish
         fleet