gold rush

noun
a large-scale and hasty movement of people to a region where gold has been discovered, as to California in 1849.

Origin:
1875–80, Americanism

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gold rush
 
n
a large-scale migration of people to a territory where gold has been found

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
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There's a danger, however, in that it's a bit of a gold rush land grab at the
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Indeed, water auctions may turn out to test the limits of the global
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