- a mine yielding gold.
- a source of great wealth or profit, or any desirable thing.
- a copious source or reserve of something required: a gold mine of information about antiques.
Origin of gold mine
late Middle English word dating back to 1425–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for gold-mine
If it is, I would rather own that property than any gold-mine I know of.'A Woman Intervenes
Have you any more of the gold-mine stock you offered me some time ago?Patchwork
Anna Balmer Myers
Porportuk was bourgeois, and Porportuk bought him out of the gold-mine.Lost Face
She represented his gold-mine, without which he had no means of living.Chatterbox, 1906
And when Gustus is twenty-one he will have half the money that came from the gold-mine.The Magic World
- a place where gold ore is mined
- a source of great wealth, profit, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for gold-mine
Online Etymology Dictionary, © 2010 Douglas Harper
Idioms and Phrases with gold-mine
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]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.