— Lethean /li thee"euhn, lee"thee euhn/ , Lethied , adj.
/lee"thee/ , n.
1. Class. Myth. a river in Hades whose water caused forgetfulness of the past in those who drank of it.
2. ( usually l.c. ) forgetfulness; oblivion.
[ léthe forgetfulness, akin to lanthánesthai to forget ]