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English definition of “be on the ball”

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be on the ball

C1 to be quick to understand and react to things: I didn't sleep well last night and I'm not really on the ball today.
Translations of “be on the ball”
in Chinese (Traditional) 機靈,靈敏…
in Russian быть расторопным…
in Turkish kolay kavrayıp hemen anlamak ve tepki vermek…
in Chinese (Simplified) 机灵,灵敏…
in Polish być czujnym…
(Definition of be on the ball from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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