"pit prop" meaning in English

{
  "forms": [
    {
      "form": "pit props",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pit prop (plural pit props)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "source": "w"
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          "kind": "other",
          "name": "Pages with entries",
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        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Construction",
          "orig": "en:Construction",
          "parents": [
            "Architecture",
            "Engineering",
            "Applied sciences",
            "Art",
            "Technology",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1915 December 2, D. Thomas Curtin, “Sweden's Rôle in the Great War”, in The World's Work, volume XXXI:",
          "text": "Whereas Germany at the outbreak of war was the greatest purchaser of Swedish iron ore, Great Britain was by far the greatest buyer of Swedish wood products. German submarines, however, have taken deadly toll of Scandinavian ships laden with pit-props bound for England.",
          "type": "quote"
        },
        {
          "ref": "1945 January and February, T. F. Cameron, “Dock Working”, in Railway Magazine, page 9:",
          "text": "Some centres specialise in timber, and those conveniently situated to the coalfields deal with large quantities of pit props.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A wooden beam used as a support within a mineshaft or tunnel."
      ],
      "id": "en-pit_prop-en-noun-voDd4RHw",
      "links": [
        [
          "mineshaft",
          "mineshaft"
        ]
      ],
      "synonyms": [
        {
          "word": "mine prop"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "beam",
          "word": "kaivospölkky"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "beam",
          "tags": [
            "masculine"
          ],
          "word": "Grubenstempel"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "beam",
          "tags": [
            "common-gender"
          ],
          "word": "gruvstolpe"
        }
      ],
      "wikipedia": [
        "pit prop"
      ]
    }
  ],
  "word": "pit prop"
}

{
  "forms": [
    {
      "form": "pit props",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pit prop (plural pit props)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations",
        "Terms with Swedish translations",
        "en:Construction"
      ],
      "examples": [
        {
          "ref": "1915 December 2, D. Thomas Curtin, “Sweden's Rôle in the Great War”, in The World's Work, volume XXXI:",
          "text": "Whereas Germany at the outbreak of war was the greatest purchaser of Swedish iron ore, Great Britain was by far the greatest buyer of Swedish wood products. German submarines, however, have taken deadly toll of Scandinavian ships laden with pit-props bound for England.",
          "type": "quote"
        },
        {
          "ref": "1945 January and February, T. F. Cameron, “Dock Working”, in Railway Magazine, page 9:",
          "text": "Some centres specialise in timber, and those conveniently situated to the coalfields deal with large quantities of pit props.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A wooden beam used as a support within a mineshaft or tunnel."
      ],
      "links": [
        [
          "mineshaft",
          "mineshaft"
        ]
      ],
      "wikipedia": [
        "pit prop"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "mine prop"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "beam",
      "word": "kaivospölkky"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "beam",
      "tags": [
        "masculine"
      ],
      "word": "Grubenstempel"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "beam",
      "tags": [
        "common-gender"
      ],
      "word": "gruvstolpe"
    }
  ],
  "word": "pit prop"
}