Definition: Meaning of, Lethe in English to English dictionary.
Pronunciation:/ ˈliːθi /
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in ancient Greek MYTHOLOGY, a river in HADES (= the place under the ground where the spirits of dead people are supposed to live) . When people who have died drink its water, they forget everything that happened when they were alive.
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