"cold iron" meaning in English

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      "expansion": "cold iron (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "swords, knives, bladed weapons",
          "word": "cold steel"
        }
      ],
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      "examples": [
        {
          "ref": "1771, Tobias Smollett, The Expedition of Humphry Clinker",
          "text": "This scene passed in presence of Lieutenant Lismahago, who encouraged Clinker to hazard a thrust of cold iron with his antagonist.",
          "type": "quotation"
        },
        {
          "ref": "1910, Rudyard Kipling, “Cold Iron”, in Rewards and Fairies",
          "text": "'Gold is for the mistress — silver for the maid — / Copper for the craftsman cunning at his trade.' / 'Good!' said the Baron, sitting in his hall, / 'But Iron — Cold Iron — is master of them all.'",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of cold steel (“swords, knives, bladed weapons”)"
      ],
      "id": "en-cold_iron-en-noun-2bDzohj5",
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          "cold steel",
          "cold steel#English"
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      "tags": [
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    }
  ],
  "word": "cold iron"
}

{
  "head_templates": [
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      "expansion": "cold iron (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "swords, knives, bladed weapons",
          "word": "cold steel"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "1771, Tobias Smollett, The Expedition of Humphry Clinker",
          "text": "This scene passed in presence of Lieutenant Lismahago, who encouraged Clinker to hazard a thrust of cold iron with his antagonist.",
          "type": "quotation"
        },
        {
          "ref": "1910, Rudyard Kipling, “Cold Iron”, in Rewards and Fairies",
          "text": "'Gold is for the mistress — silver for the maid — / Copper for the craftsman cunning at his trade.' / 'Good!' said the Baron, sitting in his hall, / 'But Iron — Cold Iron — is master of them all.'",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of cold steel (“swords, knives, bladed weapons”)"
      ],
      "links": [
        [
          "cold steel",
          "cold steel#English"
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      "tags": [
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    }
  ],
  "word": "cold iron"
}