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[oh-puh n-pit] /ˈoʊ pənˌpɪt/
adjective, Mining.
noting or pertaining to a type of surface mining in which massive, usually metallic mineral deposits are removed by cutting benches in the walls of a broad, deep funnel-shaped excavation.
Origin of open-pit
First recorded in 1910-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Historical Examples
  • The cableway is so economical in its working that it has greatly advanced the process of "open-pit" mining.

    The Romance of Modern Mechanism Archibald Williams

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