(Greek mythology) a river in Hades; the souls of the dead had to drink from it, which made them forget all they had done and suffered when they were alive
In Greek mythology, Lethe is the name of a river found in Hades (the Greek name for hell). Greek mythology says those who drink from this river forget everything. In Spellbinder/ Enchantress, Thea Harman and Eric Ross are asked to drink from the Cup of Lethe so that they forget the Night World exists.-- Back.
In Classical Greek, Lethe (λήθε; LEE-thee) literally means "forgetfulness" or "concealment". The Greek word for "truth" is a-lethe-ia (αλήθεια), meaning "un-forgetfulness" or "un-concealment".