noun
hades; realm of the dead; underworld
A Buddhist term for the dark world where the dead reside; used in religious, mythological, or literary contexts.
幽冥界に迷い込んだ魂の話を読んだ。
I read a story about a soul that wandered into the realm of the dead.
From Middle Chinese 幽冥界, composed of 幽 (dark, secluded), 冥 (dark, underworld), and 界 (world, realm). The exact historical derivation is uncertain, but the term is used in Buddhist texts to refer to the realm of the dead.