"TBM" meaning in English

{
  "forms": [
    {
      "form": "TBMs",
      "tags": [
        "plural"
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      "expansion": "TBM (plural TBMs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "tunnel boring machine"
        }
      ],
      "categories": [
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          "kind": "other",
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          "parents": [
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          "source": "w"
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          "name": "Engineering",
          "orig": "en:Engineering",
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            "Fundamental"
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        }
      ],
      "examples": [
        {
          "ref": "2022 December 14, Paul Stephen, “HS2's Dorothy starts to dig second tunnel bore”, in RAIL, number 972, page 23:",
          "text": "Four other TBMs are currently in the ground, digging twin bore tunnels under the Chilterns and in Greater London.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Initialism of tunnel boring machine."
      ],
      "id": "en-TBM-en-noun-CwlS3wGZ",
      "links": [
        [
          "engineering",
          "engineering#Noun"
        ],
        [
          "tunnel boring machine",
          "tunnel boring machine#English"
        ]
      ],
      "raw_glosses": [
        "(engineering) Initialism of tunnel boring machine."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "engineering",
        "natural-sciences",
        "physical-sciences"
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      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "tunnel-boring machine",
          "tags": [
            "masculine"
          ],
          "word": "tunnelier"
        }
      ]
    }
  ],
  "word": "TBM"
}

{
  "forms": [
    {
      "form": "TBMs",
      "tags": [
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      ]
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      "expansion": "TBM (plural TBMs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "tunnel boring machine"
        }
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      "examples": [
        {
          "ref": "2022 December 14, Paul Stephen, “HS2's Dorothy starts to dig second tunnel bore”, in RAIL, number 972, page 23:",
          "text": "Four other TBMs are currently in the ground, digging twin bore tunnels under the Chilterns and in Greater London.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Initialism of tunnel boring machine."
      ],
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        [
          "engineering",
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          "tunnel boring machine",
          "tunnel boring machine#English"
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        "(engineering) Initialism of tunnel boring machine."
      ],
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        "initialism"
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      "topics": [
        "engineering",
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      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "tunnel-boring machine",
      "tags": [
        "masculine"
      ],
      "word": "tunnelier"
    }
  ],
  "word": "TBM"
}