noun
Hades; the netherworld; the realm of the dead
A literary and somewhat archaic term for the underworld or land of the dead, often used in classical or poetic contexts. Not a common everyday word.
九泉の下で彼の魂は安らかに眠っている。
His soul rests peacefully in the netherworld below.
古典文学では、九泉は死者の国として描かれることが多い。
In classical literature, the Nine Springs is often depicted as the land of the dead.