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n. Greek Mythology
The river of forgetfulness, one of the five rivers in Hades.

[Greek Lēthē, from lēthē, forgetfulness.]

Le′the·an adj.
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The Atlantic is a Lethean stream, in our passage over which we have had an opportunity to forget the Old World and its institutions.
Minds that have been unhinged from their old faith and love, have perhaps sought this Lethean influence of exile, in which the past becomes dreamy because its symbols have all vanished, and the present too is dreamy because it is linked with no memories.
They ferry over this LETHEAN Sound Both to and fro, thir sorrow to augment, And wish and struggle, as they pass, to reach The tempting stream, with one small drop to loose In sweet forgetfulness all pain and woe, All in one moment, and so neer the brink; But fate withstands, and to oppose th' attempt MEDUSA with GORGONIAN terror guards The Ford, and of it self the water flies All taste of living wight, as once it fled The lip of TANTALUS.
She has seen that the tears are not dry on These cheeks, where the worm never dies, And has come past the stars of the Lion, To point us the path to the skies -- To the Lethean peace of the skies -- Come up, in despite of the Lion, To shine on us with her bright eyes -- Come up, through the lair of the Lion, With love in her luminous eyes.
Had Juliet so seen her love tokens dishonoured the sooner would she have sought the lethean herbs of the good apothecary.
Here anti-art becomes true art in a constant war of position with the degeneration of art's critical potential into the lethean waters of the contemporary.
in the vale below, As to the sea your limpid waves you bear Can you one kind Lethean cup bestow, To drink a long oblivion to my care?