realm of the dead; underworld; the other world
Refers to the mythological or spiritual world where the dead reside; often used in literary or religious contexts. Compare 冥土 (めいど), a more common synonym.
See also: 冥土
Rarely used alone for 'hell'; more commonly seen in compounds or as a literary synonym for 地獄. The primary sense is the general realm of the dead.
In ancient Greek mythology, the underworld is the realm ruled by Hades.
While 冥府 can sometimes refer to hell, 地獄 is the usual word.