Etymology of goaf

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A rick or stack (of hay, etc.) when laid up inside a barn (e.g., as winter fodder).",
        "That part of a mine from which the mineral has been partially or wholly removed.",
        "The waste left in old mine workings; goafing."
      ],
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        "countable",
        "uncountable"
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