"turn queen's evidence" meaning in English

{
  "forms": [
    {
      "form": "turns queen's evidence",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "turning queen's evidence",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "turned queen's evidence",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "turned queen's evidence",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "turn queen's evidence"
      },
      "expansion": "turn queen's evidence (third-person singular simple present turns queen's evidence, present participle turning queen's evidence, simple past and past participle turned queen's evidence)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British 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": "Law",
          "orig": "en:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: (when the monarch is male) turn king's evidence"
        }
      ],
      "glosses": [
        "Of a person accused of a crime, to give evidence against one's accomplices in the hope of receiving a lighter punishment. Used when the monarch is female."
      ],
      "id": "en-turn_queen's_evidence-en-verb-TKYKqTbL",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "person",
          "person"
        ],
        [
          "accused",
          "accused"
        ],
        [
          "crime",
          "crime"
        ],
        [
          "give",
          "give"
        ],
        [
          "evidence",
          "evidence"
        ],
        [
          "accomplice",
          "accomplice"
        ],
        [
          "receiving",
          "receiving"
        ],
        [
          "lighter",
          "lighter"
        ],
        [
          "punishment",
          "punishment"
        ]
      ],
      "raw_glosses": [
        "(British, law) Of a person accused of a crime, to give evidence against one's accomplices in the hope of receiving a lighter punishment. Used when the monarch is female."
      ],
      "related": [
        {
          "word": "turn state's evidence"
        }
      ],
      "tags": [
        "British"
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "word": "turn queen's evidence"
}

{
  "forms": [
    {
      "form": "turns queen's evidence",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "turning queen's evidence",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "turned queen's evidence",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "turned queen's evidence",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*",
        "head": "turn queen's evidence"
      },
      "expansion": "turn queen's evidence (third-person singular simple present turns queen's evidence, present participle turning queen's evidence, simple past and past participle turned queen's evidence)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "turn state's evidence"
    }
  ],
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English verbs",
        "en:Law"
      ],
      "examples": [
        {
          "text": "Coordinate term: (when the monarch is male) turn king's evidence"
        }
      ],
      "glosses": [
        "Of a person accused of a crime, to give evidence against one's accomplices in the hope of receiving a lighter punishment. Used when the monarch is female."
      ],
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "person",
          "person"
        ],
        [
          "accused",
          "accused"
        ],
        [
          "crime",
          "crime"
        ],
        [
          "give",
          "give"
        ],
        [
          "evidence",
          "evidence"
        ],
        [
          "accomplice",
          "accomplice"
        ],
        [
          "receiving",
          "receiving"
        ],
        [
          "lighter",
          "lighter"
        ],
        [
          "punishment",
          "punishment"
        ]
      ],
      "raw_glosses": [
        "(British, law) Of a person accused of a crime, to give evidence against one's accomplices in the hope of receiving a lighter punishment. Used when the monarch is female."
      ],
      "tags": [
        "British"
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "word": "turn queen's evidence"
}