'Sisyphus' definitions:

Definition of 'Sisyphus'

(from WordNet)
noun
(Greek legend) a king in ancient Greece who offended Zeus and whose punishment was to roll a huge boulder to the top of a steep hill; each time the boulder neared the top it rolled back down and Sisyphus was forced to start again

Definition of 'Sisyphus'

From: GCIDE
  • Sisyphus \Sis"y*phus\, n. [L. Sisyphus, Sisyphus, fr. Gr. ????.] (Class. Myth.) 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. [1913 Webster]