"2-4-0" meaning in English

{
  "forms": [
    {
      "form": "2-4-0s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "2-4-0 (plural 2-4-0s)",
      "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": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              105,
              110
            ]
          ],
          "ref": "1955 January 12, R. S. McNaught, “From the Severn to the Mersey by Great Western”, in Railway Magazine, page 19:",
          "text": "As we stood waiting for the departure time with the setting sun twinkling on the great brass dome of our 2-4-0, the sound of church bells was the only one apart from the measured tread of the guard slowly pacing towards his van, and, standing at an open window, I more than once heard the fireman's \"Right away!\" to his mate in acknowledgement of a desultory wave of the unfurled green flag.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two sets of coupled driving wheels, and no trailing wheels."
      ],
      "id": "en-2-4-0-en-noun-XEP-C0Tp",
      "links": [
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "leading wheel",
          "leading wheel"
        ],
        [
          "driving wheel",
          "driving wheel"
        ],
        [
          "trailing wheel",
          "trailing wheel"
        ]
      ]
    }
  ],
  "word": "2-4-0"
}

{
  "forms": [
    {
      "form": "2-4-0s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "2-4-0 (plural 2-4-0s)",
      "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 spelled with numbers",
        "English terms with quotations",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              105,
              110
            ]
          ],
          "ref": "1955 January 12, R. S. McNaught, “From the Severn to the Mersey by Great Western”, in Railway Magazine, page 19:",
          "text": "As we stood waiting for the departure time with the setting sun twinkling on the great brass dome of our 2-4-0, the sound of church bells was the only one apart from the measured tread of the guard slowly pacing towards his van, and, standing at an open window, I more than once heard the fireman's \"Right away!\" to his mate in acknowledgement of a desultory wave of the unfurled green flag.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two sets of coupled driving wheels, and no trailing wheels."
      ],
      "links": [
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "leading wheel",
          "leading wheel"
        ],
        [
          "driving wheel",
          "driving wheel"
        ],
        [
          "trailing wheel",
          "trailing wheel"
        ]
      ]
    }
  ],
  "word": "2-4-0"
}