- Classical Mythology. a river in Hades over which Charon ferried the souls of the dead.
- the infernal regions; hell; Hades.
noun Greek myth
- one of the rivers in Hades over which the souls of the dead were ferried by CharonCompare Styx
- the underworld or Hades
1580s, fabled river of the Lower World in Greek mythology. The name perhaps means “marsh-like” (cf. Greek akherousai “marshlike water”); the derivation from Greek akhos “woe” is considered folk etymology.