We found 24 dictionaries that define the word uncertainty principle:

General (14 matching dictionaries)

1. uncertainty principle: Merriam-Webster
2. uncertainty principle: Oxford Learner's Dictionaries
3. uncertainty principle: American Heritage Dictionary of the English Language
4. uncertainty principle: Collins English Dictionary
5. uncertainty principle: Vocabulary.com
6. uncertainty principle: Wiktionary
7. uncertainty principle: The Wordsmyth English Dictionary-Thesaurus
8. uncertainty principle: Infoplease Dictionary
9. uncertainty principle: Dictionary.com
10. The Uncertainty Principle (film), Uncertainty Principle (Numbers), Uncertainty Principle, Uncertainty principle (disambiguation), Uncertainty principle: Wikipedia, the Free Encyclopedia
11. uncertainty principle: Rhymezone
12. uncertainty principle: FreeDictionary.org
13. uncertainty principle: Mnemonic Dictionary
14. uncertainty principle: TheFreeDictionary.com

Business (1 matching dictionary)

15. BusinessDictionary.com (No longer online)

Computing (2 matching dictionaries)

16. Uncertainty Principle: Cybernetics and Systems
17. The Uncertainty Principle, uncertainty principle: Encyclopedia

Miscellaneous (1 matching dictionary)

18. Uncertainty Principle: Stanford Encyclopedia of Philosophy

Science (3 matching dictionaries)

19. Uncertainty Principle: Eric Weisstein's World of Physics
20. Uncertainty Principle: Extragalactic Astronomy
21. uncertainty principle: PlanetMath Encyclopedia

Slang (1 matching dictionary)

22. uncertainty principle: Urban Dictionary

Tech (2 matching dictionaries)

23. Schlumberger Oilfield Glossary (No longer online)
24. Rane Professional Audio Reference (No longer online)

(Note: See uncertainty_principles as well.)

Definitions from Wiktionary (uncertainty principle) ▸ noun:  (quantum mechanics) The Heisenberg uncertainty principle. Similar: indeterminacy principle, Heisenberg uncertainty principle, Heisenberg principle, quantum fluctuation, quantum indeterminacy, indeterminism, Pauli exclusion principle, Heisenberg cut, Born rule, Copenhagen interpretation, more... Opposite: certainty, determinism Phrases: Heisenberg uncertainty principle, heisenbergs uncertainty principle, heisenberg's uncertainty principle, more... ▸ Words similar to uncertainty principle ▸ Usage examples for uncertainty principle ▸ Idioms related to uncertainty principle ▸ Wikipedia articles (New!) ▸ Words that often appear near uncertainty principle ▸ Rhymes of uncertainty principle ▸ Invented words related to uncertainty principle