"track width" meaning in English

{
  "forms": [
    {
      "form": "track widths",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "track width (plural track widths)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Automotive",
          "orig": "en:Automotive",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of track (the distance between two opposite wheels on a same axletree)."
      ],
      "id": "en-track_width-en-noun-Zi0cg67t",
      "links": [
        [
          "automotive",
          "automotive"
        ],
        [
          "track",
          "track#English"
        ]
      ],
      "raw_glosses": [
        "(automotive) Synonym of track (the distance between two opposite wheels on a same axletree)."
      ],
      "synonyms": [
        {
          "extra": "the distance between two opposite wheels on a same axletree",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "track"
        }
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "track width"
}

{
  "forms": [
    {
      "form": "track widths",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "track width (plural track widths)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "en:Automotive"
      ],
      "glosses": [
        "Synonym of track (the distance between two opposite wheels on a same axletree)."
      ],
      "links": [
        [
          "automotive",
          "automotive"
        ],
        [
          "track",
          "track#English"
        ]
      ],
      "raw_glosses": [
        "(automotive) Synonym of track (the distance between two opposite wheels on a same axletree)."
      ],
      "synonyms": [
        {
          "extra": "the distance between two opposite wheels on a same axletree",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "track"
        }
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "track width"
}