From Longman Dictionary of Contemporary Englishquantum leapˌquantum ˈleap (also quantum jump) noun [countable] 🔊 🔊 IMPROVEa very large and important development or improvementquantum leap in 🔊 There has been a quantum leap in the range of the wines sold in the UK. 🔊 The treatment of breast cancer has taken a quantum leap forward.
Examples from the Corpus
quantum leap• By placing Franco in overallcommand, the Nationalists made a quantum leapforward in their efforts to securevictory.• I think that there are two aspects to the question of a quantum leap in nuclearweapons.• The orchestra's performance took a quantum leap forward.• The quantum leapexpressed itself partly in population levels.From Longman Business Dictionaryquantum leapˌquantum ˈleap British English, quantum jump American Englisha very large and important improvementQuantum leaps in information technologies have revolutionized how people work. →leap