We found 21 dictionaries that define the word brush up:

General (15 matching dictionaries)

1. brush up: Merriam-Webster
2. brush-up: Oxford Learner's Dictionaries
3. brush-up, brush-up, brush up: Collins English Dictionary
4. brush up: Vocabulary.com
5. brush-up: Wordnik
6. brush-up, brush up: Wiktionary
7. brush up: Dictionary.com
8. brush up: Rhymezone
9. brush up: AllWords.com Multi-Lingual Dictionary
10. Brush up: Dictionary of Phrase and Fable (1898)
11. brush up: FreeDictionary.org
12. brush up: Mnemonic Dictionary
13. brush-up, brush up: TheFreeDictionary.com

Business (1 matching dictionary)

14. brush up: Legal dictionary

Computing (1 matching dictionary)

15. brush up: Encyclopedia

Medicine (1 matching dictionary)

16. brush up: Medical dictionary

Miscellaneous (1 matching dictionary)

17. brush up: Idioms

Slang (1 matching dictionary)

18. brush up: Urban Dictionary

Sports (1 matching dictionary)

19. 2060 Shadow-Slang (No longer online)

(Note: See brush_ups as well.)

Definitions from Wiktionary (brush up) ▸ verb:  To paint, or make clean or bright with a brush. ▸ verb:  (idiomatic) To review; to improve an existing but rusty or underdeveloped skill. ▸ verb:  (slang, transitive) To beat up, annoy or insult (someone). Similar: Polish, polish up, round off, round, refresh, review, freshen, paint, rub up, rebrush, more... Opposite: deteriorate, neglect, forget, ignore, abandon Types: toothbrush, paintbrush, hairbrush, nailbrush, shoe brush, more... Phrases: brush up on, to brush up, like something you need to brush up on, brush up against something lightly, more... Adjectives: brushing, scrubbed, taper, grinding, brute, wax, roughcast, starch, depilatory, triturated, abradant ▸ Words similar to brush up ▸ Usage examples for brush up ▸ Idioms related to brush up ▸ Wikipedia articles (New!) ▸ Words that often appear near brush up ▸ Rhymes of brush up ▸ Invented words related to brush up