'third battle of Ypres' definitions:

Definition of 'third battle of Ypres'

(from WordNet)
noun
Battle in World War I (1917); an Allied offensive which eventually failed because tanks bogged down in the waterlogged soil of Flanders; Germans introduced mustard gas which interfered with the Allied artillery [syn: Ypres, battle of Ypres, third battle of Ypres]