"cold meat box" meaning in English

{
  "forms": [
    {
      "form": "cold meat boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cold meat box (plural cold meat boxes)",
      "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": "1899, Eugène Sue, The Works of Eugène Sue: Illustrated with Etchings, page 45",
          "text": "\"Perhaps you have a charm for never growing any older?\"\n\"No; but I could not lead such a life. I have already a bad cough.\"\n\"Ah, I see you already in the cold-meat box.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A coffin."
      ],
      "id": "en-cold_meat_box-en-noun-pRRFJXCG",
      "links": [
        [
          "coffin",
          "coffin"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, obsolete) A coffin."
      ],
      "tags": [
        "UK",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "cold meat box"
}

{
  "forms": [
    {
      "form": "cold meat boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cold meat box (plural cold meat boxes)",
      "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 slang",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1899, Eugène Sue, The Works of Eugène Sue: Illustrated with Etchings, page 45",
          "text": "\"Perhaps you have a charm for never growing any older?\"\n\"No; but I could not lead such a life. I have already a bad cough.\"\n\"Ah, I see you already in the cold-meat box.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A coffin."
      ],
      "links": [
        [
          "coffin",
          "coffin"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, obsolete) A coffin."
      ],
      "tags": [
        "UK",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "cold meat box"
}