"mort stone" meaning in English

{
  "forms": [
    {
      "form": "mort stones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mort stone (plural mort stones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1842, Henry Taylor, Edwin the Fair",
          "text": "Oh me ! the mortstone ! No it is not here!",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large stone by the wayside on which the bearers rest a coffin."
      ],
      "id": "en-mort_stone-en-noun-Bmy75DIe",
      "links": [
        [
          "coffin",
          "coffin"
        ]
      ],
      "raw_glosses": [
        "(UK, obsolete) A large stone by the wayside on which the bearers rest a coffin."
      ],
      "synonyms": [
        {
          "word": "mortstone"
        }
      ],
      "tags": [
        "UK",
        "obsolete"
      ]
    }
  ],
  "word": "mort stone"
}

{
  "forms": [
    {
      "form": "mort stones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mort stone (plural mort stones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with obsolete senses",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1842, Henry Taylor, Edwin the Fair",
          "text": "Oh me ! the mortstone ! No it is not here!",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large stone by the wayside on which the bearers rest a coffin."
      ],
      "links": [
        [
          "coffin",
          "coffin"
        ]
      ],
      "raw_glosses": [
        "(UK, obsolete) A large stone by the wayside on which the bearers rest a coffin."
      ],
      "tags": [
        "UK",
        "obsolete"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "mortstone"
    }
  ],
  "word": "mort stone"
}