"live rail" meaning in English

{
  "forms": [
    {
      "form": "live rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "live rail (plural live rails)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A rail which provides current (usually direct current (DC)) for electric trains running on third- and fourth-rail electrified systems."
      ],
      "id": "en-live_rail-en-noun-ze2n5N8S",
      "links": [
        [
          "current",
          "current"
        ],
        [
          "direct current",
          "direct current"
        ],
        [
          "DC",
          "DC"
        ]
      ],
      "synonyms": [
        {
          "word": "conductor rail"
        },
        {
          "word": "third rail"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈlaɪv ˈɹeɪl/"
    }
  ],
  "word": "live rail"
}

{
  "forms": [
    {
      "form": "live rails",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "live rail (plural live rails)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with IPA pronunciation",
        "English terms with non-redundant non-automated sortkeys",
        "en:Rail transportation"
      ],
      "glosses": [
        "A rail which provides current (usually direct current (DC)) for electric trains running on third- and fourth-rail electrified systems."
      ],
      "links": [
        [
          "current",
          "current"
        ],
        [
          "direct current",
          "direct current"
        ],
        [
          "DC",
          "DC"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈlaɪv ˈɹeɪl/"
    }
  ],
  "synonyms": [
    {
      "word": "conductor rail"
    },
    {
      "word": "third rail"
    }
  ],
  "word": "live rail"
}