"cast-iron" meaning in English

{
  "forms": [
    {
      "form": "more cast-iron",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cast-iron",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cast-iron (comparative more cast-iron, superlative most cast-iron)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cast iron"
        }
      ],
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2020 April 8, Christian Wolmar, “\"The show must go on\": the railways must remain open”, in Rail, page 49:",
          "text": "The only part of the passenger railway still in private hands is the rolling stock. The rolling stock companies (ROSCOs) have a cast-iron guarantee that come hell or high water, they still get their charges. Even if half the fleet is parked up in sidings, they are still entitled to all their payments.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of cast iron"
      ],
      "id": "en-cast-iron-en-adj-bdUdXjt9",
      "links": [
        [
          "cast iron",
          "cast iron#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "cast-iron"
}

{
  "forms": [
    {
      "form": "cast-irons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "cast-iron (countable and uncountable, plural cast-irons)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cast iron"
        }
      ],
      "categories": [
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "50 50",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Alternative spelling of cast iron"
      ],
      "id": "en-cast-iron-en-noun-bdUdXjt9",
      "links": [
        [
          "cast iron",
          "cast iron#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "cast-iron"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English uncountable nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "more cast-iron",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most cast-iron",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cast-iron (comparative more cast-iron, superlative most cast-iron)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cast iron"
        }
      ],
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2020 April 8, Christian Wolmar, “\"The show must go on\": the railways must remain open”, in Rail, page 49:",
          "text": "The only part of the passenger railway still in private hands is the rolling stock. The rolling stock companies (ROSCOs) have a cast-iron guarantee that come hell or high water, they still get their charges. Even if half the fleet is parked up in sidings, they are still entitled to all their payments.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative spelling of cast iron"
      ],
      "links": [
        [
          "cast iron",
          "cast iron#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "cast-iron"
}

{
  "categories": [
    "English adjectives",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English uncountable nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "cast-irons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "cast-iron (countable and uncountable, plural cast-irons)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "cast iron"
        }
      ],
      "glosses": [
        "Alternative spelling of cast iron"
      ],
      "links": [
        [
          "cast iron",
          "cast iron#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "cast-iron"
}