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English definition of “brush up (on) sth”

brush up (on) sth

phrasal verb with brush     /brʌʃ/ verb
C1 to improve your knowledge of something already learned but partly forgotten : I thought I'd brush up (on) my French before going to Paris .Making things betterBecoming better
(Definition of brush up (on) sth from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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