"code white" meaning in English

{
  "forms": [
    {
      "form": "code whites",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "code white (countable and uncountable, plural code whites)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An incident where a person acts violently."
      ],
      "id": "en-code_white-en-noun-OiLZ2u8Y",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "incident",
          "incident"
        ],
        [
          "violent",
          "violent"
        ]
      ],
      "raw_glosses": [
        "(Canada, medicine) An incident where a person acts violently."
      ],
      "related": [
        {
          "word": "code black • code blue • code brown • code grey • code orange • code pink • code red • code silver • code white • code yellow"
        },
        {
          "word": "colour code"
        }
      ],
      "tags": [
        "Canada",
        "countable",
        "uncountable"
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "code white"
}

{
  "forms": [
    {
      "form": "code whites",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "code white (countable and uncountable, plural code whites)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "code black • code blue • code brown • code grey • code orange • code pink • code red • code silver • code white • code yellow"
    },
    {
      "word": "colour code"
    }
  ],
  "senses": [
    {
      "categories": [
        "Canadian English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "en:Medicine"
      ],
      "glosses": [
        "An incident where a person acts violently."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "incident",
          "incident"
        ],
        [
          "violent",
          "violent"
        ]
      ],
      "raw_glosses": [
        "(Canada, medicine) An incident where a person acts violently."
      ],
      "tags": [
        "Canada",
        "countable",
        "uncountable"
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "code white"
}