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English definition of “quantum leap”

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quantum leap

noun [C usually singular] uk   us  
a great improvement or important development in something: The appointment of a female director is a quantum leap for women's equality.
Translations of “quantum leap”
in Chinese (Traditional) 飛躍,重大進展…
in Russian резкий скачок…
in Turkish çok büyük/çok önemli artış/gelişme…
in Chinese (Simplified) 飞跃,重大进展…
in Polish milowy krok, rewolucja…
(Definition of quantum leap from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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