an ace up your sleeve Meaning in the Cambridge English Dictionary
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Meaning of “an ace up your sleeve” in the English Dictionary

"an ace up your sleeve" in British English

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an ace up your sleeve

(US also an ace in the hole) secretknowledge or a ​secretskill that will give you an ​advantage
(Definition of an ace up your sleeve from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “an ace up your sleeve”
in Chinese (Simplified) 秘密王牌, 锦囊妙计…
in Chinese (Traditional) 秘密王牌, 錦囊妙計…