Of or pertaining to Lethe; resembling in effect the water of Lethe.(adjective)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "lethean" in a sentence
"Yet she had again dared to call herself happy; united to her admirer, to him who possessed and filled her whole heart, she yielded to the lethean powers of love, and knew and felt only his life and presence."
"In our mother-tongue prevails the same principle of dualism, the same conflict of elements, which not all the lethean baptism of the"
"Oh, for some lethean draught that I might drink and forget!"