Ypres
       n 1: 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: battle
            of Ypres, third battle of Ypres]
       2: battle in World War I (1915); Germans wanted to try chlorine
          (a toxic yellow gas) as a weapon and succeeded in taking
          considerable territory from the Allied salient [syn: battle
          of Ypres, second battle of Ypres]
       3: battle in World War I (1914); heavy but indecisive fighting
          as the Allies and the Germans both tried to break through
          the lines of the others [syn: battle of Ypres, first
          battle of Ypres]