Definition of Golden Fleece in US English:

Golden Fleece

proper noun

Greek Mythology
  • 1The fleece of a golden ram, guarded by an unsleeping dragon, that was sought and won by Jason with the help of Medea.

    1. 1.1 A goal that is highly desirable but difficult to achieve.

Pronunciation

Golden Fleece

/ˈɡōldən ˌflēs/