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We found 25 dictionaries with English definitions that include the word keep up:
Click on the first link on a line below to go directly to a page where "keep up" is defined.

General (20 matching dictionaries)

1. keep up: Merriam-Webster.com [home, info]
2. keep up: Oxford Learner's Dictionaries [home, info]
3. keep up: Collins English Dictionary [home, info]
4. keep up: Vocabulary.com [home, info]
5. keep up: Macmillan Dictionary [home, info]
6. keep-up: Wordnik [home, info]
7. keep (sth) up, keep up, keep up (with sb/sth): Cambridge Advanced Learner's Dictionary [home, info]
8. keep up: Wiktionary [home, info]
9. keep up: Dictionary.com [home, info]
10. keep up: UltraLingua English Dictionary [home, info]
11. Keep Up (EP), Keep Up (KSI song), Keep Up: Wikipedia, the Free Encyclopedia [home, info]
12. keep up: Rhymezone [home, info]
13. Keep Up: Dictionary of Phrase and Fable (1898) [home, info]
14. keep up: Free Dictionary [home, info]
15. keep up: Mnemonic Dictionary [home, info]
16. keep up: WordNet 1.7 Vocabulary Helper [home, info]
17. keep up: LookWAYup Translating Dictionary/Thesaurus [home, info]
18. keep up: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

19. keep up: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (1 matching dictionary)

20. keep up: Legal dictionary [home, info]

Computing (1 matching dictionary)

21. keep up: Encyclopedia [home, info]

Medicine (1 matching dictionary)

22. keep up: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

23. keep up: Idioms [home, info]

Quick definitions from WordNet (keep up) ▸ verb:  prevent from going to bed at night ▸ verb:  maintain a required pace or level ("He could not keep up and dropped out of the race") ▸ verb:  keep informed ▸ verb:  lengthen or extend in duration or space ("Keep up the good work") ▸ verb:  keep in safety and protect from harm, decay, loss, or destruction ("The old lady could not keep up the building") ▸ Words similar to keep up ▸ Usage examples for keep up ▸ Idioms related to keep up (New!) ▸ Words that often appear near keep up ▸ Rhymes of keep up ▸ Invented words related to keep up