Meaning of “opencast” in the English Dictionary

british dictionary

"opencast" in British English

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opencastadjective

uk /ˈəʊ.pən.kɑːst/ us /ˈoʊ.pən.kæst/ UK US open-cut, open-pit

used to describe a place where minerals, especially coal, are taken from the surface of the ground rather than from passages dug under it, or relating to this way of getting minerals:

opencast mine/mining

(Definition of “opencast” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)