Meanings
a geographic region of Germany, consisting of the states of North Rhine-Westphalia, Rhineland-Palatinate, and Saarland
a geographic region of Germany, consisting of the above plus Bremen and western parts of Lower Saxony, Hesse, and Baden-Württemberg (perhaps roughly on a line from the mouth of the Elbe to Lake Constance)
historicalWest Germany (a former country in Central Europe, distinguished from the German Democratic Republic, commonly known as East Germany)