"loose-coupled" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "loose-coupled (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1940 December, Charles E. Lee, “The Wenford Mineral Line”, in Railway Magazine, page 643",
          "text": "It consists exclusively of loose-coupled open mineral wagons and a guard's brake van; owing to the isolation of the branch the last-named is equipped with a first aid box and a jack, to enable any emergency to be dealt with rapidly.",
          "type": "quotation"
        },
        {
          "ref": "1961 December, “Talking of Trains: Derailment near Laindon”, in Trains Illustrated, page 717",
          "text": "The line here rises in the up direction, for the most part on a 1 in 132 gradient, and three spring-operated catch points—Basildon West, Basildon and Vange—are provided at intervals on the up line between the two stations, to derail any runaway wagons of a loose-coupled freight train.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Of older railway wagons, having a chain coupling between them, without the buffers on each wagon touching those of the next wagon when the train was in motion."
      ],
      "id": "en-loose-coupled-en-adj-xO6BdHrT",
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport, UK, historical) Of older railway wagons, having a chain coupling between them, without the buffers on each wagon touching those of the next wagon when the train was in motion."
      ],
      "tags": [
        "UK",
        "historical",
        "not-comparable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "loose-coupled"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "loose-coupled (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "British English",
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with historical senses",
        "English terms with quotations",
        "English uncomparable adjectives",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1940 December, Charles E. Lee, “The Wenford Mineral Line”, in Railway Magazine, page 643",
          "text": "It consists exclusively of loose-coupled open mineral wagons and a guard's brake van; owing to the isolation of the branch the last-named is equipped with a first aid box and a jack, to enable any emergency to be dealt with rapidly.",
          "type": "quotation"
        },
        {
          "ref": "1961 December, “Talking of Trains: Derailment near Laindon”, in Trains Illustrated, page 717",
          "text": "The line here rises in the up direction, for the most part on a 1 in 132 gradient, and three spring-operated catch points—Basildon West, Basildon and Vange—are provided at intervals on the up line between the two stations, to derail any runaway wagons of a loose-coupled freight train.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Of older railway wagons, having a chain coupling between them, without the buffers on each wagon touching those of the next wagon when the train was in motion."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ]
      ],
      "raw_glosses": [
        "(rail transport, UK, historical) Of older railway wagons, having a chain coupling between them, without the buffers on each wagon touching those of the next wagon when the train was in motion."
      ],
      "tags": [
        "UK",
        "historical",
        "not-comparable"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "loose-coupled"
}