"heavy rail" meaning in English

{
  "antonyms": [
    {
      "word": "light rail"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "heavy rail (uncountable)",
      "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": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019 October 23, Andy Coward, “New acclaim for Oldham Loop”, in RAIL, number 890, page 63",
          "text": "As with all Metrolink routes on the network, the Oldham-Rochdale line is performing well. Passenger usage is now considerably higher than when it was in use for heavy rail services, [...]",
          "type": "quotation"
        },
        {
          "ref": "2022 November 30, Paul Bigland, “Destination Oban: a Sunday in Scotland”, in RAIL, number 971, page 75",
          "text": "This section of line is a rarity, with heavy rail passenger and freight services sharing tracks with the Tyne and Wear Metro as far as Pelaw, where the Metro services run onto dedicated tracks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A term generally applied to main-line railways, but this varies from country to country. It has no relation to the weight of the rails used."
      ],
      "id": "en-heavy_rail-en-noun-xm0zeqxJ",
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A term generally applied to main-line railways, but this varies from country to country. It has no relation to the weight of the rails used."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "heavy rail"
}

{
  "antonyms": [
    {
      "word": "light rail"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "heavy rail (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "2019 October 23, Andy Coward, “New acclaim for Oldham Loop”, in RAIL, number 890, page 63",
          "text": "As with all Metrolink routes on the network, the Oldham-Rochdale line is performing well. Passenger usage is now considerably higher than when it was in use for heavy rail services, [...]",
          "type": "quotation"
        },
        {
          "ref": "2022 November 30, Paul Bigland, “Destination Oban: a Sunday in Scotland”, in RAIL, number 971, page 75",
          "text": "This section of line is a rarity, with heavy rail passenger and freight services sharing tracks with the Tyne and Wear Metro as far as Pelaw, where the Metro services run onto dedicated tracks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A term generally applied to main-line railways, but this varies from country to country. It has no relation to the weight of the rails used."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A term generally applied to main-line railways, but this varies from country to country. It has no relation to the weight of the rails used."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "heavy rail"
}