"line speed" meaning in English

{
  "forms": [
    {
      "form": "line speeds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "line speed (plural line speeds)",
      "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": "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": "2020 June 3, “Network News: Kilsby Tunnel closure allows essential repair work”, in Rail, page 16:",
          "text": "NR had introduced [a] speed restriction for the 400 trains that pass daily on this section of the West Coast Main Line between Rugby and Milton Keynes, but since the work the full 110mph line speed has been reinstated.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The maximum speed at which trains can run on a given railway line, or section of line."
      ],
      "id": "en-line_speed-en-noun-qGfnYo3o",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "maximum",
          "maximum"
        ],
        [
          "train",
          "train"
        ],
        [
          "given",
          "given"
        ],
        [
          "railway line",
          "railway line"
        ],
        [
          "section",
          "section"
        ]
      ],
      "raw_glosses": [
        "(rail transport) The maximum speed at which trains can run on a given railway line, or section of line."
      ],
      "synonyms": [
        {
          "word": "linespeed"
        }
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "line speed"
}

{
  "forms": [
    {
      "form": "line speeds",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "line speed (plural line speeds)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "2020 June 3, “Network News: Kilsby Tunnel closure allows essential repair work”, in Rail, page 16:",
          "text": "NR had introduced [a] speed restriction for the 400 trains that pass daily on this section of the West Coast Main Line between Rugby and Milton Keynes, but since the work the full 110mph line speed has been reinstated.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The maximum speed at which trains can run on a given railway line, or section of line."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "maximum",
          "maximum"
        ],
        [
          "train",
          "train"
        ],
        [
          "given",
          "given"
        ],
        [
          "railway line",
          "railway line"
        ],
        [
          "section",
          "section"
        ]
      ],
      "raw_glosses": [
        "(rail transport) The maximum speed at which trains can run on a given railway line, or section of line."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "linespeed"
    }
  ],
  "word": "line speed"
}