"tunnelling" meaning in English

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      "expansion": "tunnelling",
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
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          "_dis": "14 86",
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      "examples": [
        {
          "ref": "1950 October, “Completion of Flood-Damage Repairs, East Coast Main Line”, in Railway Magazine, page 709",
          "text": "As it was necessary to reconstruct the culvert close to the original position, the hazards of tunnelling through clay in an unstable condition, due to the absorption of water, had to be reduced by the application of electro-osmosis to dry out the material.",
          "type": "quotation"
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      "form_of": [
        {
          "word": "tunnel"
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      "glosses": [
        "present participle and gerund of tunnel"
      ],
      "id": "en-tunnelling-en-verb-XlFn3hcI",
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          "tunnel#English"
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      "raw_glosses": [
        "(British spelling) present participle and gerund of tunnel"
      ],
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  "synonyms": [
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      "_dis1": "0 0",
      "tags": [
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      "word": "tunneling"
    }
  ],
  "word": "tunnelling"
}

{
  "forms": [
    {
      "form": "tunnellings",
      "tags": [
        "plural"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "word": "tunneling"
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      "glosses": [
        "Alternative form of tunneling"
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          "tunneling",
          "tunneling#English"
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      "_dis1": "0 0",
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      "word": "tunneling"
    }
  ],
  "word": "tunnelling"
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
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      "examples": [
        {
          "ref": "1950 October, “Completion of Flood-Damage Repairs, East Coast Main Line”, in Railway Magazine, page 709",
          "text": "As it was necessary to reconstruct the culvert close to the original position, the hazards of tunnelling through clay in an unstable condition, due to the absorption of water, had to be reduced by the application of electro-osmosis to dry out the material.",
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        "present participle and gerund of tunnel"
      ],
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        [
          "tunnel",
          "tunnel#English"
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      "raw_glosses": [
        "(British spelling) present participle and gerund of tunnel"
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  "synonyms": [
    {
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      ],
      "word": "tunneling"
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  ],
  "word": "tunnelling"
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  "forms": [
    {
      "form": "tunnellings",
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  "lang_code": "en",
  "pos": "noun",
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        "Alternative form of tunneling"
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          "tunneling",
          "tunneling#English"
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      "word": "tunneling"
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  "word": "tunnelling"
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