"six-wheeler" meaning in English

{
  "forms": [
    {
      "form": "six-wheelers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "six-wheeler (plural six-wheelers)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Vehicles",
          "orig": "en:Vehicles",
          "parents": [
            "Machines",
            "Transport",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1950 April, Two Belfast Correspondents, “The Last Days of the Belfast and County Down Railway”, in Railway Magazine, page 267:",
          "text": "Driver Cerr spent so long complaining to us about the quality of the coal that we had barely time to get into coach No. 51, the oldest type of third-class six-wheeler, as we moved off.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A vehicle of any type fitted with six wheels."
      ],
      "id": "en-six-wheeler-en-noun-DGOgjZf8",
      "links": [
        [
          "vehicle",
          "vehicle"
        ],
        [
          "six",
          "six"
        ],
        [
          "wheel",
          "wheel"
        ]
      ]
    }
  ],
  "word": "six-wheeler"
}

{
  "forms": [
    {
      "form": "six-wheelers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "six-wheeler (plural six-wheelers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "en:Vehicles"
      ],
      "examples": [
        {
          "ref": "1950 April, Two Belfast Correspondents, “The Last Days of the Belfast and County Down Railway”, in Railway Magazine, page 267:",
          "text": "Driver Cerr spent so long complaining to us about the quality of the coal that we had barely time to get into coach No. 51, the oldest type of third-class six-wheeler, as we moved off.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A vehicle of any type fitted with six wheels."
      ],
      "links": [
        [
          "vehicle",
          "vehicle"
        ],
        [
          "six",
          "six"
        ],
        [
          "wheel",
          "wheel"
        ]
      ]
    }
  ],
  "word": "six-wheeler"
}