quantum leap
/ˈkwɑn·təm ˈlip/ n [C] (also quantum jump /ˈkwɑn·təm ˈdʒʌmp/)Definition
› 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 n from the Cambridge Academic Content Dictionary
© Cambridge University Press)
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