"maiden run" meaning in English

{
  "forms": [
    {
      "form": "maiden runs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "maiden run (plural maiden runs)",
      "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": "1961 March, C. P. Boocock, “The organisation of Eastleigh Locomotive Works”, in Trains Illustrated, page 160",
          "text": "On February 17, 1956, the first one, No. 35018, left Eastleigh on its maiden run with a Bournemouth stopping train.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Its first trip in service, in some cases after a rebuild."
      ],
      "id": "en-maiden_run-en-noun-ActDFKUM",
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "qualifier": "train",
      "raw_glosses": [
        "(rail transport, of a locomotive, train, etc.) Its first trip in service, in some cases after a rebuild."
      ],
      "raw_tags": [
        "of a locomotive"
      ],
      "related": [
        {
          "word": "maiden voyage"
        }
      ],
      "tags": [
        "usually"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "maiden run"
}

{
  "forms": [
    {
      "form": "maiden runs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "maiden run (plural maiden runs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "maiden voyage"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1961 March, C. P. Boocock, “The organisation of Eastleigh Locomotive Works”, in Trains Illustrated, page 160",
          "text": "On February 17, 1956, the first one, No. 35018, left Eastleigh on its maiden run with a Bournemouth stopping train.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Its first trip in service, in some cases after a rebuild."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "qualifier": "train",
      "raw_glosses": [
        "(rail transport, of a locomotive, train, etc.) Its first trip in service, in some cases after a rebuild."
      ],
      "raw_tags": [
        "of a locomotive"
      ],
      "tags": [
        "usually"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "maiden run"
}