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We found 54 dictionaries with English definitions that include the word quantum:
Click on the first link on a line below to go directly to a page where "quantum" is defined.

General dictionaries General (34 matching dictionaries)
  1. quantum: Oxford Dictionaries [home, info]
  2. quantum: American Heritage Dictionary of the English Language [home, info]
  3. quantum: Collins English Dictionary [home, info]
  4. quantum: Vocabulary.com [home, info]
  5. quantum: Macmillan Dictionary [home, info]
  6. quantum: Merriam-Webster's Online Dictionary, 11th Edition [home, info]
  7. Quantum, quantum: Wordnik [home, info]
  8. quantum: Cambridge Advanced Learner's Dictionary [home, info]
  9. Quantum: Wiktionary [home, info]
  10. quantum: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. quantum: V2 Vocabulary Building Dictionary [home, info]
  12. quantum: The Wordsmyth English Dictionary-Thesaurus [home, info]
  13. quantum: Infoplease Dictionary [home, info]
  14. quantum: Dictionary.com [home, info]
  15. quantum: Online Etymology Dictionary [home, info]
  16. quantum: UltraLingua English Dictionary [home, info]
  17. quantum: Cambridge Dictionary of American English [home, info]
  18. quantum: Cambridge International Dictionary of Idioms [home, info]
  19. Quantum (James Bond), Quantum (TV Series), Quantum (Toronto), Quantum (album), Quantum (board game), Quantum (comics), Quantum (disambiguation), Quantum (game), Quantum (journal), Quantum (magazine), Quantum (management philosophy), Quantum (physics), Quantum (video game), Quantum: Wikipedia, the Free Encyclopedia [home, info]
  20. Quantum: Online Plain Text English Dictionary [home, info]
  21. quantum: Webster's Revised Unabridged, 1913 Edition [home, info]
  22. quantum: Rhymezone [home, info]
  23. Quantum: AllWords.com Multi-Lingual Dictionary [home, info]
  24. quantum: Webster's 1828 Dictionary [home, info]
  25. quantum: Hutchinson's Dictionary of Difficult Words [home, info]
  26. quantum: Free Dictionary [home, info]
  27. quantum: Hutchinson Dictionaries [home, info]
  28. quantum: Mnemonic Dictionary [home, info]
  29. quantum: WordNet 1.7 Vocabulary Helper [home, info]
  30. quantum: LookWAYup Translating Dictionary/Thesaurus [home, info]
  31. quantum: Dictionary/thesaurus [home, info]
  32. Quantum: World Wide Words [home, info]

Business dictionaries Business (5 matching dictionaries)
  1. quantum: Webster's New World Law Dictionary [home, info]
  2. Quantum, Quantum: Duhaime's Canadian law dictionary [home, info]
  3. Quantum: International Law Dictionary [home, info]
  4. Quantum: INSOLVENCY [home, info]
  5. Quantum (physics), quantum: Legal dictionary [home, info]

Computing dictionaries Computing (3 matching dictionaries)
  1. quantum: Free On-line Dictionary of Computing [home, info]
  2. Quantum: Computer Telephony & Electronics Dictionary and Glossary [home, info]
  3. Quantum (physics), quantum: Encyclopedia [home, info]

Medicine dictionaries Medicine (2 matching dictionaries)
  1. quantum: online medical dictionary [home, info]
  2. Quantum (physics), quantum: Medical dictionary [home, info]

Miscellaneous dictionaries Miscellaneous (1 matching dictionary)
  1. quantum: Idioms [home, info]

Science dictionaries Science (6 matching dictionaries)
  1. Quantum: Extragalactic Astronomy [home, info]
  2. quantum: General Chemistry Online [home, info]
  3. quantum: UNCChem Glossary [home, info]
  4. Quantum: Accelerator Glossary [home, info]
  5. quantum: How Many? A Dictionary of Units of Measurement [home, info]
  6. QUANTUM: Zoom Astronomy Glossary [home, info]

Slang dictionaries Slang (1 matching dictionary)
  1. Quantum: Urban Dictionary [home, info]

Tech dictionaries Tech (2 matching dictionaries)
  1. quantum: Webster's New World Telecom Dictionary [home, info]
  2. Quantum: Mower Terms [home, info]

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (quantum)

noun:  (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory)
noun:  a discrete amount of something that is analogous to the quantum in quantum theory

Word origin

Phrases that include quantum:   quantum mechanics, quantum computing, magnetic quantum number, light quantum, azimuthal quantum number, more...

Words similar to quantum:   amount, measure, quanta, quantity, more...

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