"ironside" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "iron",
        "3": "side"
      },
      "expansion": "iron + side",
      "name": "compound"
    }
  ],
  "etymology_text": "From iron + side.",
  "forms": [
    {
      "form": "ironsides",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ironside (plural ironsides)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
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          "kind": "other",
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          "parents": [],
          "source": "w"
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      ],
      "examples": [
        {
          "ref": "1964, John Newman Edwards, Shelby's expedition to Mexico, page 104:",
          "text": "In his principles he was an ironside of the Cromwellian type.",
          "type": "quote"
        }
      ],
      "glosses": [
        "One who is very strong and courageous."
      ],
      "id": "en-ironside-en-noun-0orDlUMK",
      "links": [
        [
          "strong",
          "strong"
        ],
        [
          "courageous",
          "courageous"
        ]
      ]
    }
  ],
  "word": "ironside"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "iron",
        "3": "side"
      },
      "expansion": "iron + side",
      "name": "compound"
    }
  ],
  "etymology_text": "From iron + side.",
  "forms": [
    {
      "form": "ironsides",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "ironside (plural ironsides)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1964, John Newman Edwards, Shelby's expedition to Mexico, page 104:",
          "text": "In his principles he was an ironside of the Cromwellian type.",
          "type": "quote"
        }
      ],
      "glosses": [
        "One who is very strong and courageous."
      ],
      "links": [
        [
          "strong",
          "strong"
        ],
        [
          "courageous",
          "courageous"
        ]
      ]
    }
  ],
  "word": "ironside"
}