Noun second battle of ypres has 1 sense
  1. Ypres, battle of Ypres, second battle of Ypres - 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
    --1 is a kind of pitched battle
    --1 is a part of
     World War I, World War 1, Great War, First World War, War to End War
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