quantum leapEnglishOxford Dictionary of Englishquantum leap /ˌkwɒntəm ˈliːp / ▸ noun a huge, often sudden, increase or advance in something: there has been a quantum leap in the quality of wines marketed in the UK.
EnglishOxford Dictionary of EnglishEnglishOxford Dictionary of English
EnglishOxford Dictionary of English