Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An abrupt change or step, especially in method, information, or knowledge: "War was going to take a quantum leap; it would never be the same” ( Garry Wills).
Wiktionary
- n. physics The discontinuous change of the state of an electron in an atom or molecule from one energy level to another.
- n. metaphorical An abrupt change.
WordNet 3.0
- n. a sudden large increase or advance
Examples
“The big, underrated A-3 Skywarrior represented a quantum leap in size and capability of carrier aircraft when it appeared in”
“The foundation trains Amanae Practitioners, who help clients bypass their mind and ego to shift out deep emotions and traumas held in the body, take a quantum leap into a more conscious and vital union of spirit, mind, and body, and move into their full integrity and magnificence.”
“The Hegemony had chosen us to help crew one of its precious quantum leap C-plus spinships, so how could we be less than gods?”
“Consciousness-based healthcare represents a quantum leap beyond mind-body medicine in that the consciousness, or non-local mind, of the practitioner extends into the body of the person seeking help.”
“The Prowler was a quantum leap in electronic warfare.”
Lists
These user-created lists contain the word ‘quantum leap’.
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Everything is Quantum
More than a century has passed since the most recent paradigm shift in physical sciences(I prefer using physical sciences to natural sciences in here) took place and scientists are revealing the qu...
quantum mechanics, quantum information, quantum computation, quantum teleporta..., quantum cryptography, quantum chemistry, quantum biology, quantum logic, quantum game, quantum correlation, quantum interference, quantum entanglement and 47 more...
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phrases
ironic detachment, get one's leg over, run wild, mad as a box of f..., keep your chin up, baker's dozen, fire a shot in anger, have a field day, go over with a fi..., as the crow flies, leap of faith, learn one's lesson and 224 more...
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FULL HOUSE
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begins with "qu"
"Qu..." seems to produce some extraordinarily euphonious words.
quiescent, quantifiable, quadrilateral, quackery, quaff, quadrennial, quadruplicate, quaking aspen, qualmish, quandaries, quark, quartziferous and 31 more...
Tweets
Looking for tweets for quantum leap.

hepburn Joey: Hold it. I'm about to make a quantum leap in diaper theory.
Jesse: Go with it. Go with it. (1-2) Jan 23, 2012
skipvia See rolig's excellent observation (and sionnach's response) on quantum. I've been getting this wrong for years. Dec 21, 2008