"backstone" meaning in English

{
  "etymology_number": 1,
  "forms": [
    {
      "form": "backstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backstone (plural backstones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "bakestone"
        }
      ],
      "categories": [
        {
          "_dis": "92 8",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
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          "_dis": "93 7",
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      ],
      "glosses": [
        "Alternative form of bakestone"
      ],
      "id": "en-backstone-en-noun-l5LpyZcH",
      "links": [
        [
          "bakestone",
          "bakestone#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "backstone"
}

{
  "etymology_number": 2,
  "forms": [
    {
      "form": "backstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backstone (plural backstones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "ref": "2000, Aubrey Burl, The Stone Circles of Britain, Ireland, and Brittany (page 225)",
          "text": "[…] the backstones of the burial-chambers were a deep red."
        },
        {
          "ref": "2008, Tatjana Kytmannow, Portal Tombs in the Landscape (page 39)",
          "text": "Backstones in an intact tomb normally function to support the capstone and to define the rear end of the chamber."
        }
      ],
      "glosses": [
        "A stone at the rear of something."
      ],
      "id": "en-backstone-en-noun-ZQ9YlqZX"
    }
  ],
  "word": "backstone"
}

{
  "categories": [
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    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
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  "etymology_number": 1,
  "forms": [
    {
      "form": "backstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backstone (plural backstones)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "bakestone"
        }
      ],
      "glosses": [
        "Alternative form of bakestone"
      ],
      "links": [
        [
          "bakestone",
          "bakestone#English"
        ]
      ],
      "tags": [
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  ],
  "word": "backstone"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_number": 2,
  "forms": [
    {
      "form": "backstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "backstone (plural backstones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "examples": [
        {
          "ref": "2000, Aubrey Burl, The Stone Circles of Britain, Ireland, and Brittany (page 225)",
          "text": "[…] the backstones of the burial-chambers were a deep red."
        },
        {
          "ref": "2008, Tatjana Kytmannow, Portal Tombs in the Landscape (page 39)",
          "text": "Backstones in an intact tomb normally function to support the capstone and to define the rear end of the chamber."
        }
      ],
      "glosses": [
        "A stone at the rear of something."
      ]
    }
  ],
  "word": "backstone"
}