Definition of Lethean in English:

Lethean

adjective

  • Causing oblivion or forgetfulness of the past.

    ‘writing induced a kind of Lethean forgetfulness’

Origin

Mid 17th century: from the river Lethe in Hades, whose water when drunk made the souls of the dead forget their life on earth.

Pronunciation

Lethean

/liːˈθiːən/