from The American Heritage® Dictionary of the English Language, 4th 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).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The discontinuous change of the state of an electron in an atom or molecule from one energy level to another.
  • n. An abrupt change.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a sudden large increase or advance


Sorry, no etymologies found.


    Sorry, no example sentences found.


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  • Joey: Hold it. I'm about to make a quantum leap in diaper theory.

    Jesse: Go with it. Go with it. (1-2)

    January 23, 2012

  • See rolig's excellent observation (and sionnach's response) on quantum. I've been getting this wrong for years.

    December 21, 2008