The meaning of QUANTUM LEAP is an abrupt change, sudden increase, or dramatic advance. How to use quantum leap in a sentence.

noun [ C ] us / ˈkwɑn·təm ˈlip / (also quantum jump, us / ˈkwɑn·təm ˈdʒʌmp /) Add to word list a great improvement or important advance in something:

a sudden, great and important change, improvement or development. This discovery marks a quantum leap forward in the fight against cancer. There has been a quantum leap in profits …

Definition of 'quantum leap' quantum leap in British English or quantum jump noun a sudden highly significant advance; breakthrough

A quantum leap refers to the sudden transition of an electron from one energy level to another within an atom, typically involving the absorption or emission of a photon.

Factsheet What does the noun quantum leap mean? There are two meanings listed in OED's entry for the noun quantum leap. See ‘Meaning & use’ for definitions, usage, and quotation …

Jul 28, 2025 · The term “quantum leap” has entered popular language to mean a sudden, dramatic change. In physics, it describes how electrons move between energy levels in an atom.

A dramatic advance, especially in knowledge or method, as in Establishing a central bank represents a quantum leap in this small country's development. This term originated as …

From Longman Dictionary of Contemporary English ˌquantum ˈleap (also quantum jump) noun [countable] a very large and important development or improvement quantum leap in There …

quantum leap (noun) quantum leap noun plural quantum leaps Britannica Dictionary definition of QUANTUM LEAP [count] : a sudden large change, development, or improvement