"train of thinking" meaning in English

{
  "forms": [
    {
      "form": "trains of thinking",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "trains of thinking"
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      "expansion": "train of thinking (plural trains of thinking)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "train of thought"
        }
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          "name": "English entries with incorrect language header",
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            "Entries with incorrect language header",
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          "source": "w"
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          "source": "w"
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      "examples": [
        {
          "ref": "1895, H. G. Wells, chapter X, in The Time Machine:",
          "text": "Exploring, I found another short gallery running transversely to the first. This appeared to be devoted to minerals, and the sight of a block of sulphur set my mind running on gunpowder. But I could find no saltpeter; indeed no nitrates of any kind. Doubtless they had deliquesced ages ago. Yet the sulphur hung in my mind and set up a train of thinking.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of train of thought"
      ],
      "id": "en-train_of_thinking-en-noun-0r7F7nx7",
      "links": [
        [
          "train of thought",
          "train of thought#English"
        ]
      ],
      "tags": [
        "alt-of",
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    }
  ],
  "word": "train of thinking"
}

{
  "forms": [
    {
      "form": "trains of thinking",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "trains of thinking"
      },
      "expansion": "train of thinking (plural trains of thinking)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "train of thought"
        }
      ],
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        "English countable nouns",
        "English entries with incorrect language header",
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        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
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      "examples": [
        {
          "ref": "1895, H. G. Wells, chapter X, in The Time Machine:",
          "text": "Exploring, I found another short gallery running transversely to the first. This appeared to be devoted to minerals, and the sight of a block of sulphur set my mind running on gunpowder. But I could find no saltpeter; indeed no nitrates of any kind. Doubtless they had deliquesced ages ago. Yet the sulphur hung in my mind and set up a train of thinking.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of train of thought"
      ],
      "links": [
        [
          "train of thought",
          "train of thought#English"
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      ],
      "tags": [
        "alt-of",
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    }
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  "word": "train of thinking"
}