"lynchpin" meaning in English

{
  "forms": [
    {
      "form": "lynchpins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lynchpin (plural lynchpins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linchpin"
        }
      ],
      "categories": [
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1864, Baily's Magazine of Sports & Pastimes, volume 8, page 110",
          "text": "Every design that villainy could suggest was had recourse to in the hopes of nobbling Wild Dayrell; but never being left for an hour by either his trainer or jockey, he escaped the intended 'coopering', even when the lynchpins of the wheels of his van had been tampered with.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of linchpin"
      ],
      "id": "en-lynchpin-en-noun-lBHiQunQ",
      "links": [
        [
          "linchpin",
          "linchpin#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "lynchpin"
}

{
  "forms": [
    {
      "form": "lynchpins",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "lynchpinning",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "lynchpinned",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "lynchpinned",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "++"
      },
      "expansion": "lynchpin (third-person singular simple present lynchpins, present participle lynchpinning, simple past and past participle lynchpinned)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linchpin"
        }
      ],
      "categories": [
        {
          "_dis": "48 52",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Alternative form of linchpin"
      ],
      "id": "en-lynchpin-en-verb-lBHiQunQ",
      "links": [
        [
          "linchpin",
          "linchpin#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "lynchpin"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English verbs"
  ],
  "forms": [
    {
      "form": "lynchpins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lynchpin (plural lynchpins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linchpin"
        }
      ],
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1864, Baily's Magazine of Sports & Pastimes, volume 8, page 110",
          "text": "Every design that villainy could suggest was had recourse to in the hopes of nobbling Wild Dayrell; but never being left for an hour by either his trainer or jockey, he escaped the intended 'coopering', even when the lynchpins of the wheels of his van had been tampered with.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of linchpin"
      ],
      "links": [
        [
          "linchpin",
          "linchpin#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "lynchpin"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English verbs"
  ],
  "forms": [
    {
      "form": "lynchpins",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "lynchpinning",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "lynchpinned",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "lynchpinned",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "++"
      },
      "expansion": "lynchpin (third-person singular simple present lynchpins, present participle lynchpinning, simple past and past participle lynchpinned)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "linchpin"
        }
      ],
      "glosses": [
        "Alternative form of linchpin"
      ],
      "links": [
        [
          "linchpin",
          "linchpin#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "lynchpin"
}