gold mine

Definitions

1. A mine for gold ore or metal.
2. A very profitable economic venture.
   idiomatic
3. A plentiful stockpile of something sought-after.
   idiomatic

Equivalents

Examples

“South Africa has many goldmines.”

“This oil deposit⟳ is a regular gold mine. We make⟳ more and more money every year!”

“The possessors of Salisbury & Yeovil Railway shares had ample compensation for the anxiety which the first few years of the company's existence had given them, for the concern⟳ proved a veritable gold mine.”

“[Hal Varian] went to work⟳ helping Page, Brin, and Schmidt develop⟳ more efficient auction algorithms and build⟳ the auction model⟳ that became such a gold mine for Google.”

“The Smithsonian Institution is a goldmine of knowledge, but like⟳ most mines, you have⟳ to dig⟳ for the good stuff.”

CEFR level