‖Acheron|ˈækərɒn|[L. Acheron a.Gr.ἀχέρων.]A fabulous river of the Lower World; hence, the infernal regions.1590Shakes.Mids. N. iii. ii. 357With drooping fogge as blacke as Acheron.1637MiltonComus 604Under the sooty flag of Acheron.1667―P.L. ii. 578Sad Acheron of sorrow, black and deep.1756BurkeSubl. & B.Wks.I. 199The poisonous exhalation of Acheron is not forgot.