Rich. It means rich. Before Japan in the 80s it also meant white.
Poland, for example, is not as rich as China, yet Poland is part of the west and China is not. And there are many examples like that.
Nowadays China is taking the helm of "east" from Russia, but either way it's a geopolitical concept and remnant.
Stop saying this because it isn't true. It is an artifact of the Tetrachy of the Roman Empire.
Poland is definitely Western aligned, as Japan or Australia, which shows the absurdity of this model.
For a while there was legit economic competition, Soviet GDP outpaced the US for a time in the 50s, but eventually the economies of scale and efficiency produced by the capitalist West out-competed the Soviets and won the Cold War.
Saudi Arabia is rich, it is not "Western"