Meaning of Golden Fleece

Gold'en Fleece'

Pronunciation: [key]
— Class. Myth. Class. Myth.
  1. a fleece of pure gold, kept at Colchis by King Aeëtes from whom it was stolen by Jason and the Argonauts with the help of Aeëtes's daughter, Medea.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.