We found 30 dictionaries that define the word gray matter:

General (15 matching dictionaries)

1. gray matter: Merriam-Webster
2. gray matter: Oxford Learner's Dictionaries
3. gray matter: The Word Spy
4. gray matter: American Heritage Dictionary of the English Language
5. gray matter: Vocabulary.com
6. gray matter: Wiktionary
7. gray matter: The Wordsmyth English Dictionary-Thesaurus
8. gray matter: Infoplease Dictionary
9. gray matter: Dictionary.com
10. Gray Matter (Breaking Bad), Gray Matter (band), Gray Matter (short story), Gray Matter (video game), Gray Matter, Gray matter: Wikipedia, the Free Encyclopedia
11. gray matter: Rhymezone
12. gray matter: FreeDictionary.org
13. gray matter: Mnemonic Dictionary
14. gray matter: TheFreeDictionary.com

Business (1 matching dictionary)

15. gray matter: Legal dictionary

Computing (2 matching dictionaries)

16. gray matter: Netlingo
17. gray matter: Encyclopedia

Medicine (10 matching dictionaries)

18. gray matter: Merriam-Webster Medical Dictionary
19. Gray matter, Matter, gray: MedTerms.com Medical Dictionary
20. ABTA Brain Tumor Patients (No longer online)
21. online medical dictionary (No longer online)
22. Multiple Sclerosis Encyclopaedia (No longer online)
23. Neurotrauma Glossary (No longer online)
24. gray matter: Medical dictionary
25. WeMove Glossary of Terms (No longer online)
26. Gray matter, Matter, gray: Drug Medical Dictionary
27. Hyperdictionary (No longer online)

Miscellaneous (1 matching dictionary)

28. gray matter: Idioms

Slang (1 matching dictionary)

29. Gray-Matter, gray matter: Urban Dictionary

(Note: See gray_matters as well.)

Definitions from Wiktionary (gray matter) ▸ noun:  (American spelling) Alternative spelling of grey matter [(idiomatic) Brains; a person's ability to think.] Similar: grey matter, gray substance, grey substance, substantia grisea, gray cells, gray area, braincell, brain graph, grey eminence, grayware, more... Opposite: white matter, myelin Types: cerebrum, cerebellum, medulloblongata, pons, thalamus, hypothalamus, pituitary gland, more... Phrases: Gray Matter Interactive, Gray matter heterotopia, more... Adjectives: pan, brained, brainy, cerebrotonic, genius, ingenious, intelligent, long-headed, genial, savvy, smart ▸ Words similar to gray matter ▸ Usage examples for gray matter ▸ Idioms related to gray matter ▸ Wikipedia articles (New!) ▸ Words that often appear near gray matter ▸ Rhymes of gray matter ▸ Invented words related to gray matter