noun
a philosophical doctrine that denies the reality of the universe and holds that it has no real existence
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Acosmism is a philosophical belief that the universe is devoid of any ultimate reality or purpose.
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Some people think acosmism is just a fancy way of saying the universe is meaningless.
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Who cares about acosmism? I'm just trying to live my life.
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In the darkness of his mind, acosmism clouded his thoughts like a thick fog.