"tube train" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Tube"
      },
      "expansion": "Tube",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "London Underground"
      },
      "expansion": "London Underground",
      "name": "l"
    }
  ],
  "etymology_text": "Probably named after the shape of the tunnels; the Tube is an informal name for London Underground which has been trademarked.",
  "forms": [
    {
      "form": "tube trains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tube train (plural tube trains)",
      "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": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1979, The Boomtown Rats (lyrics and music), “Wind Chill Factor (Minus Zero)”, in The Fine Art of Surfacing",
          "text": "I took a tube train through the subway systems / I rode those tunnels like a six-foot mole",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A smaller-profile underground train which operates through the tube tunnels under London, which have a small cross section."
      ],
      "id": "en-tube_train-en-noun-znzJC2TS",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "underground",
          "underground"
        ]
      ],
      "raw_glosses": [
        "(rail transport, UK) A smaller-profile underground train which operates through the tube tunnels under London, which have a small cross section."
      ],
      "tags": [
        "UK"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "tube train"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Tube"
      },
      "expansion": "Tube",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "London Underground"
      },
      "expansion": "London Underground",
      "name": "l"
    }
  ],
  "etymology_text": "Probably named after the shape of the tunnels; the Tube is an informal name for London Underground which has been trademarked.",
  "forms": [
    {
      "form": "tube trains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tube train (plural tube trains)",
      "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 quotations",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1979, The Boomtown Rats (lyrics and music), “Wind Chill Factor (Minus Zero)”, in The Fine Art of Surfacing",
          "text": "I took a tube train through the subway systems / I rode those tunnels like a six-foot mole",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A smaller-profile underground train which operates through the tube tunnels under London, which have a small cross section."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "underground",
          "underground"
        ]
      ],
      "raw_glosses": [
        "(rail transport, UK) A smaller-profile underground train which operates through the tube tunnels under London, which have a small cross section."
      ],
      "tags": [
        "UK"
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "tube train"
}