Definition of "gold mine" in английский

Noun

1. A mine for gold ore or metal.

   • South Africa has many goldmines.

2. A very profitable economic venture.

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

3. A plentiful stockpile of something sought-after.

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