Undreamed of wealth, success, or progress is better or greater than anyone would think possible.

We enjoy a standard of living undreamed of by the majority of people in the world. 我们享受的生活水准是世界上大多数人做梦都想不到的。

[ before noun ] These two young men have enjoyed undreamed-of success with their first album. 这两位小伙子第一张专辑就获得意想不到的成功。