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definitions

open-pit

[oh-puh n-pit]
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.

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 of open-pit

  • The cableway is so economical in its working that it has greatly advanced the process of "open-pit" mining.