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English definition of “quantum leap”

quantum leap

noun [C]    /ˈkwɑn·təm ˈlip/ (also quantum jump,  /ˈkwɑn·təm ˈdʒʌmp/)
a great improvement or important advance in something: It was a revolutionary generation of computers that was a quantum leap beyond anything on the market.
(Definition of quantum leap noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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