Webster's Revised Unabridged Dictionary · 1913

Sisyphus

Sisyphus , noun

[Latin Sisyphus, Sisyphus, from Greek {not transcribed}.]

(Class. Mythology) A king of Corinth, son of Aeolus, famed for his cunning. He was killed by Theseus, and in the lower world was condemned by Pluto to roll to the top of a hill a huge stone, which constantly rolled back again, making his task incessant.