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We found 52 dictionaries with English definitions that include the word brightness:
Click on the first link on a line below to go directly to a page where "brightness" is defined.

General (27 matching dictionaries)

1. brightness: Merriam-Webster.com [home, info]
2. brightness: Oxford Learner's Dictionaries [home, info]
3. brightness: American Heritage Dictionary of the English Language [home, info]
4. brightness: Collins English Dictionary [home, info]
5. brightness: Vocabulary.com [home, info]
6. Brightness, brightness: Wordnik [home, info]
7. brightness: Cambridge Advanced Learner's Dictionary [home, info]
8. brightness: Wiktionary [home, info]
9. brightness: Webster's New World College Dictionary, 4th Ed. [home, info]
10. brightness: UltraLingua English Dictionary [home, info]
11. brightness: Cambridge Dictionary of American English [home, info]
12. Brightness (disambiguation), Brightness (sound), Brightness, The Brightness: Wikipedia, the Free Encyclopedia [home, info]
13. Brightness: Online Plain Text English Dictionary [home, info]
14. brightness: Webster's Revised Unabridged, 1913 Edition [home, info]
15. brightness: Rhymezone [home, info]
16. Brightness: AllWords.com Multi-Lingual Dictionary [home, info]
17. brightness: Webster's 1828 Dictionary [home, info]
18. brightness: Free Dictionary [home, info]
19. brightness: Mnemonic Dictionary [home, info]
20. brightness: WordNet 1.7 Vocabulary Helper [home, info]
21. brightness: LookWAYup Translating Dictionary/Thesaurus [home, info]
22. brightness: Dictionary/thesaurus [home, info]
23. brightness: The Wordsmyth English Dictionary-Thesaurus [home, info]
24. brightness: Infoplease Dictionary [home, info]
25. brightness: Dictionary.com [home, info]

Art (4 matching dictionaries)

26. brightness: ArtLex Lexicon of Visual Art Terminology [home, info]
27. Brightness: English-Chinese Dictionary of Graphic Communications (Big 5) [home, info]
28. BRIGHTNESS: Technical Glossary of Theatre Terms [home, info]
29. brightness: Graphic Design Dictionary [home, info]

Business (1 matching dictionary)

30. brightness: Legal dictionary [home, info]

Computing (4 matching dictionaries)

31. brightness: Free On-line Dictionary of Computing [home, info]
32. brightness: CCI Computer [home, info]
33. brightness: Computer Telephony & Electronics Dictionary and Glossary [home, info]
34. brightness: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

35. brightness: online medical dictionary [home, info]
36. brightness: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

37. brightness: Idioms [home, info]

Science (3 matching dictionaries)

38. Brightness: Eric Weisstein's World of Mathematics [home, info]
39. Brightness: Eric Weisstein's World of Physics [home, info]
40. Brightness: Extragalactic Astronomy [home, info]

Slang (1 matching dictionary)

41. Brightness: Urban Dictionary [home, info]

Tech (9 matching dictionaries)

42. brightness: Book Binding [home, info]
43. Brightness: AUTOMOTIVE TERMS [home, info]
44. brightness: Lighting Design Glossary [home, info]
45. brightness: Glossary of Meteorology [home, info]
46. Brightness: Nikonians Photo Glossary [home, info]
47. Brightness: Paper Making [home, info]
48. Brightness: National Weather Service Glossary [home, info]
49. Brightness: PhotoNotes Dictionary of Film and Digital Photography [home, info]
50. brightness (luminance): Television: Critical Methods and Applications [home, info]

Quick definitions from WordNet (brightness) ▸ noun:  the location of a visual perception along the black-to-white continuum ▸ noun:  intelligence as manifested in being quick and witty ▸ noun:  the quality of being luminous; emitting or reflecting light ▸ Words similar to brightness ▸ Usage examples for brightness ▸ Idioms related to brightness (New!) ▸ Popular adjectives describing brightness ▸ Words that often appear near brightness ▸ Rhymes of brightness ▸ Invented words related to brightness