"sledge hammer" meaning in English

{
  "forms": [
    {
      "form": "sledge hammers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "sledge hammer (plural sledge hammers)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "sledgehammer"
        }
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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          "parents": [],
          "source": "w"
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      "examples": [
        {
          "bold_text_offsets": [
            [
              228,
              241
            ]
          ],
          "ref": "1958 February 14, David Gunston, “Railways on the Screen”, in Railway Magazine, page 87:",
          "text": "One of his best stories was \"Barney Oldfield's Race for a Life\" (1914), of which there survives only an amusing still, showing poor Mabel Normand chained to the rails by two toughs, the moustached villain threatening her with a sledge-hammer, and an awful sense of that inexorably approaching express!",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of sledgehammer."
      ],
      "id": "en-sledge_hammer-en-noun-KCxkFQ-n",
      "links": [
        [
          "sledgehammer",
          "sledgehammer#English"
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      "tags": [
        "alt-of",
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    }
  ],
  "word": "sledge hammer"
}

{
  "forms": [
    {
      "form": "sledge hammers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sledge hammer (plural sledge hammers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "sledgehammer"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
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      "examples": [
        {
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            [
              228,
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          "ref": "1958 February 14, David Gunston, “Railways on the Screen”, in Railway Magazine, page 87:",
          "text": "One of his best stories was \"Barney Oldfield's Race for a Life\" (1914), of which there survives only an amusing still, showing poor Mabel Normand chained to the rails by two toughs, the moustached villain threatening her with a sledge-hammer, and an awful sense of that inexorably approaching express!",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of sledgehammer."
      ],
      "links": [
        [
          "sledgehammer",
          "sledgehammer#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "sledge hammer"
}