"single-driver" meaning in English

{
  "forms": [
    {
      "form": "single-drivers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single-driver (plural single-drivers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1945 March and April, “Preserving Historic Locomotives”, in Railway Magazine, page 64:",
          "text": "A few such examples have been preserved, as is well known, such as one of the Stirling 8-ft. singles of the late Great Northern Railway, the Great Western 4-4-0 City of Truro, ex-Caledonian single-driver No. 123, the Brighton 0-4-2 Gladstone, and others.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A steam locomotive with a single driving axle."
      ],
      "id": "en-single-driver-en-noun-yB7aKcmp",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "driving axle",
          "driving axle"
        ]
      ],
      "raw_glosses": [
        "(rail transport, British, obsolete) A steam locomotive with a single driving axle."
      ],
      "synonyms": [
        {
          "word": "single"
        }
      ],
      "tags": [
        "British",
        "obsolete"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "single-driver"
}

{
  "forms": [
    {
      "form": "single-drivers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "single-driver (plural single-drivers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1945 March and April, “Preserving Historic Locomotives”, in Railway Magazine, page 64:",
          "text": "A few such examples have been preserved, as is well known, such as one of the Stirling 8-ft. singles of the late Great Northern Railway, the Great Western 4-4-0 City of Truro, ex-Caledonian single-driver No. 123, the Brighton 0-4-2 Gladstone, and others.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A steam locomotive with a single driving axle."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ],
        [
          "driving axle",
          "driving axle"
        ]
      ],
      "raw_glosses": [
        "(rail transport, British, obsolete) A steam locomotive with a single driving axle."
      ],
      "synonyms": [
        {
          "word": "single"
        }
      ],
      "tags": [
        "British",
        "obsolete"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "single-driver"
}