"fire cart" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ko",
        "3": "화차(火車)"
      },
      "expansion": "Calque of Korean 화차(火車) (hwacha)",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of Korean 화차(火車) (hwacha).",
  "forms": [
    {
      "form": "fire carts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fire cart (plural fire carts)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with 1 entry",
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          "source": "w"
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        {
          "kind": "other",
          "langcode": "en",
          "name": "Weapons",
          "orig": "en:Weapons",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of hwacha (historical Korean weapon)"
      ],
      "id": "en-fire_cart-en-noun-Gjvn1ckC",
      "links": [
        [
          "hwacha",
          "hwacha#English"
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      ],
      "synonyms": [
        {
          "extra": "historical Korean weapon",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "hwacha"
        }
      ]
    }
  ],
  "word": "fire cart"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ko",
        "3": "화차(火車)"
      },
      "expansion": "Calque of Korean 화차(火車) (hwacha)",
      "name": "calque"
    }
  ],
  "etymology_text": "Calque of Korean 화차(火車) (hwacha).",
  "forms": [
    {
      "form": "fire carts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fire cart (plural fire carts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
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        "English terms derived from Korean",
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        "en:Weapons"
      ],
      "glosses": [
        "Synonym of hwacha (historical Korean weapon)"
      ],
      "links": [
        [
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        ]
      ],
      "synonyms": [
        {
          "extra": "historical Korean weapon",
          "tags": [
            "synonym",
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          "word": "hwacha"
        }
      ]
    }
  ],
  "word": "fire cart"
}