DCHP-1 Online
Eldorado [< Sp. el dorado the gilded (place)] 
1 n. a place where much gold is being mined or is reported to be in abundance; a rich goldfield.
- 1861 That mighty monarch "the Press" has recently presented another El Dorado to the wonderous gaze of that great potentate the public . . . the Saskatchewan Diggings.
- 1937 The average man who thinks of the Yukon recalls the famous gold rush and pictures the scenes . . . of ice wastes and tremendous hardships over trails where thousands of men and horses lay down to die before ever the El Dorado was reached.
2 n. a rich strike; bonanza.
- 1912 And you were afraid we would pinch the Graham eldorado on him?
- 1954 I wondered whether they had won through in the end to their Eldorado on the Yukon River, or whether the Nahanni or the Indians could best tell what became of them.
3 n. rich and rewarding quantities of anything.
- 1889 On a bright and beautiful Sabbath morning, he struck one of those El-Dorados; hundreds of thousands of seals surrounded his ship.
- 1916 It is a fact that we scarcely heard of Colonel Pellatt till Canada began to be prosperous with great railways, fabulous mines, eldoradoes of arable land, the rise of marvellous power plants on the brink of Niagara with transmission lines stretching over half a province, and the bumptious, parabolic curves of real estate that would persist in going up and up regardless of what the land was worth in rent.
- 1861 That mighty monarch "the Press" has recently presented another El Dorado to the wonderous gaze of that great potentate the public . . . the Saskatchewan Diggings.