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We found 27 dictionaries with English definitions that include the word open up:
Click on the first link on a line below to go directly to a page where "open up" is defined.

General (19 matching dictionaries)

1. open up: Merriam-Webster.com [home, info]
2. open up: Oxford Dictionaries [home, info]
3. open up: Collins English Dictionary [home, info]
4. open up: Vocabulary.com [home, info]
5. open up: Macmillan Dictionary [home, info]
6. open-up: Wordnik [home, info]
7. open (sth) up, open up: Cambridge Advanced Learner's Dictionary [home, info]
8. open up: Wiktionary [home, info]
9. open up: Dictionary.com [home, info]
10. open up: UltraLingua English Dictionary [home, info]
11. Open Up (Cog song), Open Up (Leftfield song), Open Up (Mungo Jerry song), Open Up: Wikipedia, the Free Encyclopedia [home, info]
12. open up: Rhymezone [home, info]
13. open up: Free Dictionary [home, info]
14. open up: Mnemonic Dictionary [home, info]
15. open up: WordNet 1.7 Vocabulary Helper [home, info]
16. open up: LookWAYup Translating Dictionary/Thesaurus [home, info]
17. open up: Dictionary/thesaurus [home, info]

Business (4 matching dictionaries)

18. Open Up: MoneyGlossary.com [home, info]
19. Open up: Bloomberg Financial Glossary [home, info]
20. Open Up (disambiguation), open up: Legal dictionary [home, info]
21. Open Up (disambiguation), Open up: Financial dictionary [home, info]

Computing (1 matching dictionary)

22. open up: Encyclopedia [home, info]

Medicine (1 matching dictionary)

23. open up: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

24. open up: Idioms [home, info]

Slang (1 matching dictionary)

25. open up: Urban Dictionary [home, info]

Quick definitions from WordNet (open up) ▸ verb:  talk freely and without inhibition ▸ verb:  start to operate or function or cause to start operating or functioning ▸ verb:  make available ▸ verb:  become available ▸ verb:  cause to open or to become open ▸ verb:  become open ▸ verb:  open up an area or prepare a way ▸ Words similar to open up ▸ Usage examples for open up ▸ Words that often appear near open up ▸ Rhymes of open up ▸ Invented words related to open up