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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: Merriam-Webster.com [home, info]
  2. quantum: Oxford Learner's Dictionaries [home, info]
  3. quantum: American Heritage Dictionary of the English Language [home, info]
  4. quantum: Collins English Dictionary [home, info]
  5. quantum: Vocabulary.com [home, info]
  6. quantum: Macmillan Dictionary [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 (Mozilla), Quantum (album), Quantum (book), Quantum (comics), Quantum (disambiguation), Quantum (journal), Quantum (physics), Quantum (software), 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]

(Note: See quantums for more definitions.)

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

▸ Also see quantums
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Phrases that include quantum:   quantum mechanics, quantum meruit, quantum field theory, quantum computing, quantum computer, more...

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

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