Acheron

n. (Greek Mythology) river in Hades over which Charon ferried the souls of the dead; infernal areas, hell; Hades

This article concerns the Greek river. For other uses, see Acheron (disambiguation). The Acheron is a river located in the Epirus region of northwest Greece. Acheron translates as the "river of woe" and it was believed to be a branch of the underworld river Styx over which in ancient Greek mythology Charon ferried the newly dead souls across into Hades.
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Noun
1. (Greek mythology) a river in Hades across which the souls of the dead were carried by Charon
(synonym) River Acheron
(hypernym) river
(part-holonym) Hel, Hell, Hades, infernal region, netherworld, Scheol, underworld
(classification) Greek mythology

(n.)
A river in the Nether World or infernal regions; also, the infernal regions themselves. By some of the English poets it was supposed to be a flaming lake or gulf.
  

[Greek] The name of one of the five rivers (occasionally also regarded as a lake) that flow through the realm of Hades. The name means "river of woe", and is often metaphorically used for Hades itself. Here the shades are ferried across by Charon. (Virgil VI, 107).