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English definition of “master key”

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master key

noun [C] uk   us  
a key that can be used to open any of several different locks
Translations of “master key”
in Chinese (Traditional) 萬能鎖匙…
in Chinese (Simplified) 万能钥匙…
(Definition of master key from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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