"Killing form" meaning in English

{
  "etymology_text": "Named after Wilhelm Killing.",
  "forms": [
    {
      "form": "Killing forms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Killing form (plural Killing forms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
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            "Fundamental"
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      ],
      "glosses": [
        "A symmetric bilinear form that plays a basic role in the theories of Lie groups and Lie algebras."
      ],
      "id": "en-Killing_form-en-noun-qIp8em~g",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "symmetric",
          "symmetric"
        ],
        [
          "bilinear",
          "bilinear"
        ],
        [
          "form",
          "form"
        ],
        [
          "Lie group",
          "Lie group"
        ],
        [
          "Lie algebra",
          "Lie algebra"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A symmetric bilinear form that plays a basic role in the theories of Lie groups and Lie algebras."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Killing form",
        "Wilhelm Killing"
      ]
    }
  ],
  "word": "Killing form"
}

{
  "etymology_text": "Named after Wilhelm Killing.",
  "forms": [
    {
      "form": "Killing forms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Killing form (plural Killing forms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
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        "en:Mathematics"
      ],
      "glosses": [
        "A symmetric bilinear form that plays a basic role in the theories of Lie groups and Lie algebras."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "symmetric",
          "symmetric"
        ],
        [
          "bilinear",
          "bilinear"
        ],
        [
          "form",
          "form"
        ],
        [
          "Lie group",
          "Lie group"
        ],
        [
          "Lie algebra",
          "Lie algebra"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A symmetric bilinear form that plays a basic role in the theories of Lie groups and Lie algebras."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Killing form",
        "Wilhelm Killing"
      ]
    }
  ],
  "word": "Killing form"
}