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We found 34 dictionaries with English definitions that include the word brighten:
Click on the first link on a line below to go directly to a page where "brighten" is defined.

General (29 matching dictionaries)

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

Business (1 matching dictionary)

28. brighten: Legal dictionary [home, info]

Computing (1 matching dictionary)

29. brighten: Encyclopedia [home, info]

Medicine (1 matching dictionary)

30. brighten: online medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

31. brighten: Idioms [home, info]

Slang (1 matching dictionary)

32. Brighten: Urban Dictionary [home, info]

(Note: See brightens for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (brighten) ▸ verb:  become brighter ("The sky brightened around noon") ▸ verb:  become brighter ("The sky brightened") ▸ verb:  make lighter or brighter ("The paint will brighten the room") ▸ verb:  become clear ▸ Also see brightens ▸ Words similar to brighten ▸ Usage examples for brighten ▸ Idioms related to brighten (New!) ▸ Words that often appear near brighten ▸ Rhymes of brighten ▸ Invented words related to brighten