"double track" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "double track",
      "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"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a section of railway line or tramline consisting of two parallel tracks, one being used in one direction and the other in the opposite direction."
      ],
      "id": "en-double_track-en-noun-wCdmuC8Z",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway line",
          "railway line"
        ],
        [
          "tramline",
          "tramline"
        ],
        [
          "parallel",
          "parallel"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a section of railway line or tramline consisting of two parallel tracks, one being used in one direction and the other in the opposite direction."
      ],
      "related": [
        {
          "word": "double-track"
        },
        {
          "word": "double-tracking"
        }
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "sense": "two parallel tracks",
          "tags": [
            "neuter"
          ],
          "word": "dobbeltspor"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "two parallel tracks",
          "tags": [
            "masculine"
          ],
          "word": "iarnród déraonach"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "two parallel tracks",
          "tags": [
            "masculine"
          ],
          "word": "iarnród dúbailte"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "two parallel tracks",
          "tags": [
            "neuter"
          ],
          "word": "dobbeltspor"
        },
        {
          "code": "nn",
          "lang": "Norwegian Nynorsk",
          "sense": "two parallel tracks",
          "tags": [
            "neuter"
          ],
          "word": "dobbeltspor"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "two parallel tracks",
          "word": "dwutorowy"
        }
      ],
      "wikipedia": [
        "double track"
      ]
    }
  ],
  "word": "double track"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "double track",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "double-track"
    },
    {
      "word": "double-tracking"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "en:Rail transportation"
      ],
      "glosses": [
        "a section of railway line or tramline consisting of two parallel tracks, one being used in one direction and the other in the opposite direction."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "railway line",
          "railway line"
        ],
        [
          "tramline",
          "tramline"
        ],
        [
          "parallel",
          "parallel"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a section of railway line or tramline consisting of two parallel tracks, one being used in one direction and the other in the opposite direction."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "double track"
      ]
    }
  ],
  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "sense": "two parallel tracks",
      "tags": [
        "neuter"
      ],
      "word": "dobbeltspor"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "two parallel tracks",
      "tags": [
        "masculine"
      ],
      "word": "iarnród déraonach"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "two parallel tracks",
      "tags": [
        "masculine"
      ],
      "word": "iarnród dúbailte"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "two parallel tracks",
      "tags": [
        "neuter"
      ],
      "word": "dobbeltspor"
    },
    {
      "code": "nn",
      "lang": "Norwegian Nynorsk",
      "sense": "two parallel tracks",
      "tags": [
        "neuter"
      ],
      "word": "dobbeltspor"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "two parallel tracks",
      "word": "dwutorowy"
    }
  ],
  "word": "double track"
}