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Meaning of “rack your brains” in the English Dictionary

"rack your brains" in British English

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rack your brains

UK (US rack your brain)
to ​think very hard: I've been ​racking my ​brains all ​day but I can't ​remember her ​name.
(Definition of rack your brains from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “rack your brains”
in Chinese (Simplified) 绞尽脑汁, 搜肠刮肚…
in Chinese (Traditional) 絞盡腦汁, 搜腸刮肚…
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