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We found 62 dictionaries with English definitions that include the word up:
Click on the first link on a line below to go directly to a page where "up" is defined.

General (34 matching dictionaries)

1. up, up-: MyWord.info [home, info]
2. U.P, UP, up, uP: Stammtisch Beau Fleuve Acronyms [home, info]
3. Up: Dictionary of Phrase and Fable (1898) [home, info]
4. up: Free Dictionary [home, info]
5. up: Mnemonic Dictionary [home, info]
6. up: WordNet 1.7 Vocabulary Helper [home, info]
7. up: LookWAYup Translating Dictionary/Thesaurus [home, info]
8. UP, up-: Dictionary/thesaurus [home, info]
9. UP, up: Merriam-Webster.com [home, info]
10. up, up-: Oxford Dictionaries [home, info]
11. UP, up, up-: American Heritage Dictionary of the English Language [home, info]
12. up, up-: Collins English Dictionary [home, info]
13. up: Vocabulary.com [home, info]
14. up, up, up, up-: Macmillan Dictionary [home, info]
15. UP, Up, up, up, up, up, uP: Wordnik [home, info]
16. up, up-: Cambridge Advanced Learner's Dictionary [home, info]
17. U.P, UP, up, up-: Wiktionary [home, info]
18. up, up-: Webster's New World College Dictionary, 4th Ed. [home, info]
19. up, up-: The Wordsmyth English Dictionary-Thesaurus [home, info]
20. up: Infoplease Dictionary [home, info]
21. UP, u.p, up, up-: Dictionary.com [home, info]
22. up-, up (adv.), up (v.): Online Etymology Dictionary [home, info]
23. up: UltraLingua English Dictionary [home, info]
24. up: Cambridge Dictionary of American English [home, info]
25. up, up, up: Cambridge International Dictionary of Idioms [home, info]
26. The Up, UP (TV channel), UP (complexity), UP, Up (ABC album), Up (Australian bank), Up (Great Big Sea album), Up (James Morrison song), Up (Olly Murs song), Up (Peter Gabriel album), Up (Pop Evil album), Up (R.E.M. album), Up (Right Said Fred album), Up (Soundtrack), Up (TV channel), Up (TV network), Up (TV program), Up (TV series), Up (The Saturdays song), Up (airline), Up (film), Up (film score), Up (film series), Up (video game), Up, Up, -up: Wikipedia, the Free Encyclopedia [home, info]
27. up: Cambridge International Dictionary of Phrasal Verbs [home, info]
28. Up: Online Plain Text English Dictionary [home, info]
29. up: Webster's Revised Unabridged, 1913 Edition [home, info]
30. up: Rhymezone [home, info]
31. up: AllWords.com Multi-Lingual Dictionary [home, info]
32. up: Webster's 1828 Dictionary [home, info]

Art (2 matching dictionaries)

33. UP: Glossary of Stamp Collecting Terms [home, info]
34. up: Seinfeld Dictionary [home, info]

Business (4 matching dictionaries)

35. Up: Bloomberg Financial Glossary [home, info]
36. UP (initialism), Up (album), Up, Up: Financial dictionary [home, info]
37. u.p: Glossary of Trade and Shipping Terms [home, info]
38. Up: MoneyGlossary.com [home, info]

Computing (6 matching dictionaries)

39. UP: Webopedia [home, info]
40. UP (initialism), Up (album), Up, up: Encyclopedia [home, info]
41. up: Free On-line Dictionary of Computing [home, info]
42. up: Netlingo [home, info]
43. up: CCI Computer [home, info]
44. UP: BABEL: Computer Oriented Abbreviations and Acronyms [home, info]

Medicine (1 matching dictionary)

45. up, up-: online medical dictionary [home, info]

Miscellaneous (5 matching dictionaries)

46. Up: Brilliant Dream Dictionary [home, info]
47. UP, UP, UP: Terminology and Descriptions of Geneaological Words [home, info]
48. uP: Acronym Finder [home, info]
49. UP: AbbreviationZ [home, info]
50. up: Idioms [home, info]

Science (1 matching dictionary)

51. up: LITTLE EXPLORERS(TM) Picture Dictionary [home, info]

Slang (3 matching dictionaries)

52. Up: Dublin Slang and Phrasebook [home, info]
53. U.P, up, the up: Urban Dictionary [home, info]
54. up: English slang and colloquialisms used in the United Kingdom [home, info]

Sports (4 matching dictionaries)

55. up: Hickok Sports Glossaries [home, info]
56. Up: Texas Hold'em Dictionary [home, info]
57. up: Golfer's Dictionary [home, info]
58. Up: Dan's Poker [home, info]

Tech (2 matching dictionaries)

59. Up: Paper Making [home, info]
60. UP: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]

(Note: See ups for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (up) ▸ verb:  raise ("Up the ante") ▸ adjective:  open ("The windows are up") ▸ adjective:  being or moving higher in position or greater in some value; being above a former position or level ("The anchor is up") ▸ adjective:  getting higher or more vigorous ("Its an up market") ▸ adverb:  spatially or metaphorically from a lower to a higher position ("Look up!") ▸ adverb:  to a later time ("They moved the meeting date up") ▸ adverb:  to a more central or a more northerly place ("Was transferred up to headquarters") ▸ adverb:  nearer to the speaker ("He walked up and grabbed my lapels") ▸ adverb:  to a higher intensity ("He turned up the volume") ▸ Also see ups ▸ Word origin ▸ Words similar to up ▸ Usage examples for up ▸ Popular nouns described by up ▸ Words that often appear near up ▸ Rhymes of up ▸ Invented words related to up