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We found 51 dictionaries with English definitions that include the word upgrade:
Click on the first link on a line below to go directly to a page where "upgrade" is defined.

General (25 matching dictionaries)

1. upgrade: Merriam-Webster.com [home, info]
2. upgrade: Oxford Dictionaries [home, info]
3. upgrade: American Heritage Dictionary of the English Language [home, info]
4. upgrade: Collins English Dictionary [home, info]
5. upgrade: Vocabulary.com [home, info]
6. upgrade, upgrade: Macmillan Dictionary [home, info]
7. Upgrade, upgrade: Wordnik [home, info]
8. upgrade: Cambridge Advanced Learner's Dictionary [home, info]
9. upgrade: Wiktionary [home, info]
10. upgrade: Webster's New World College Dictionary, 4th Ed. [home, info]
11. upgrade: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. upgrade: Infoplease Dictionary [home, info]
13. upgrade: Dictionary.com [home, info]
14. upgrade (n.): Online Etymology Dictionary [home, info]
15. upgrade: UltraLingua English Dictionary [home, info]
16. upgrade: Cambridge Dictionary of American English [home, info]
17. Upgrade (film), Upgrade: Wikipedia, the Free Encyclopedia [home, info]
18. upgrade: Rhymezone [home, info]
19. upgrade: Free Dictionary [home, info]
20. upgrade: Mnemonic Dictionary [home, info]
21. upgrade: WordNet 1.7 Vocabulary Helper [home, info]
22. upgrade: LookWAYup Translating Dictionary/Thesaurus [home, info]
23. upgrade: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

24. upgrade: Linguistic Glossary [home, info]
25. upgrade: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (9 matching dictionaries)

26. Upgrade: MoneyGlossary.com [home, info]
27. upgrade: Webster's New World Finance & Investment Dictionary [home, info]
28. upgrade: Travel Industry Dictionary [home, info]
29. upgrade: INVESTORWORDS [home, info]
30. Upgrade: Investopedia [home, info]
31. Upgrade: Comprehensive Financial [home, info]
32. upgrade: Legal dictionary [home, info]
33. Upgrade: Financial dictionary [home, info]
34. upgrade: BusinessDictionary.com [home, info]

Computing (9 matching dictionaries)

35. upgrade: Free On-line Dictionary of Computing [home, info]
36. upgrade: Netlingo [home, info]
37. upgrade: CCI Computer [home, info]
38. Upgrade: Computer Telephony & Electronics Dictionary and Glossary [home, info]
39. Upgrade: Internet Terms [home, info]
40. Upgrade: Internet Terms [home, info]
41. upgrade: I T Glossary [home, info]
42. Upgrade: Technopedia [home, info]
43. upgrade: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

44. upgrade: online medical dictionary [home, info]
45. upgrade: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

46. upgrade: Idioms [home, info]

Slang (1 matching dictionary)

47. upgrade: Urban Dictionary [home, info]

Tech (2 matching dictionaries)

48. upgrade: Webster's New World Telecom Dictionary [home, info]
49. UPGRADE: Energy Terms [home, info]

(Note: See upgrading for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (upgrade) ▸ noun:  the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components) ("The power plant received a new upgrade") ▸ noun:  hardware that provides better performance than an earlier version did ▸ noun:  the property possessed by a slope or surface that rises ▸ noun:  a reservation that is upgraded ("I got an upgrade to first class when coach class was full") ▸ noun:  software that provides better performance than an earlier version did ▸ noun:  an upward slope or grade (as in a road) ▸ verb:  give better travel conditions to ("The airline upgraded me when I arrived late and Coach Class was full") ▸ verb:  get better travel conditions ("I upgraded to First Class when Coach Class was overbooked") ▸ verb:  rate higher; raise in value or esteem ▸ verb:  to improve, especially something that was old or outdated ("I've upgraded my computer so I can run better software") ▸ verb:  give a promotion to or assign to a higher position ▸ Also see upgrading ▸ Word origin ▸ Words similar to upgrade ▸ Usage examples for upgrade ▸ Popular adjectives describing upgrade ▸ Words that often appear near upgrade ▸ Rhymes of upgrade ▸ Invented words related to upgrade