Meaning of “Queen's evidence” in the English Dictionary

british dictionary

"Queen's evidence" in British English

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Queen's evidencenoun [ U ]

uk /ˌkwiːnz ˈev.ɪ.dəns/ us /ˌkwiːnz ˈev.ə.dəns/ UK specialized

evidence from someone who has been accused of committing a crime, given against the people who were accused with them, in order to have their own punishment reduced

turn Queen's evidence

to give evidence against someone else in this way

(Definition of “Queen's evidence” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)