gold mine

American  

noun

1. a mine yielding gold.

2. a source of great wealth or profit, or any desirable thing.

3. a copious source or reserve of something required.

   a gold mine of information about antiques.

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gold mine British  

noun

1. a place where gold ore is mined

2. a source of great wealth, profit, etc

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gold mine Idioms  

1. A rich, plentiful source of wealth or some other desirable thing, as in That business proved to be a gold mine, or She's a gold mine of information about the industry. [First half of 1800s]

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Other Word Forms

• gold-miner noun
• gold-mining noun

Etymology

Origin of gold mine

late Middle English word dating back to 1425–75

Example Sentences

Initially, the government said that would include the Martabe gold mine, which conservationists have regularly accused of environmental damage.

From Barron's

Dead batteries yield lithium, cobalt and nickel; LED screens contain germanium; circuit boards hold platinum and palladium; hard disks store rare earths -- e‑waste has long been described as a "gold mine" for critical minerals.

From Barron's

There are currently only two operational mines on the island -- one gold mine in the south, and one for anorthosite, a rock containing titanium, on the west coast.

From Barron's

It’s also worth asking whether the clear winners, AI companies attracting monster private-market valuations, might have a compelling product but not quite the gold mine everyone assumes.

From The Wall Street Journal

Thomas Kaplan is pushing ahead on what he’s dubbed America’s gold mine.

From The Wall Street Journal