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open-pit

[oh-puh n-pit]
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adjective Mining.
  1. 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.
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Origin of open-pit

First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for open-pit

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