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We found 37 dictionaries with English definitions that include the word online:
Click on the first link on a line below to go directly to a page where "online" is defined.

General (22 matching dictionaries)

1. online: Merriam-Webster.com [home, info]
2. online: Oxford Learner's Dictionaries [home, info]
3. online: American Heritage Dictionary of the English Language [home, info]
4. online: Collins English Dictionary [home, info]
5. online: Vocabulary.com [home, info]
6. online: Macmillan Dictionary [home, info]
7. ONline, Online, online: Wordnik [home, info]
8. online: Cambridge Advanced Learner's Dictionary [home, info]
9. online: Wiktionary [home, info]
10. online: Webster's New World College Dictionary, 4th Ed. [home, info]
11. online: Dictionary.com [home, info]
12. online: Online Etymology Dictionary [home, info]
13. online: Cambridge Dictionary of American English [home, info]
14. Online (album), Online (disambiguation), Online (magazine), Online (song), Online: Wikipedia, the Free Encyclopedia [home, info]
15. Online, online: AllWords.com Multi-Lingual Dictionary [home, info]
16. online: Free Dictionary [home, info]
17. online: Mnemonic Dictionary [home, info]
18. online: WordNet 1.7 Vocabulary Helper [home, info]
19. online: Dictionary/thesaurus [home, info]
20. online: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

21. ONLINE, online: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (2 matching dictionaries)

22. Online: Broadcast Media Terms [home, info]
23. online: BusinessDictionary.com [home, info]

Computing (9 matching dictionaries)

24. online: Netlingo [home, info]
25. online: CCI Computer [home, info]
26. Online: Game Dictionary [home, info]
27. Online: Technology Terms and Acronyms [home, info]
28. online: Computer Telephony & Electronics Dictionary and Glossary [home, info]
29. Online: Tech Terms Computer Dictionary [home, info]
30. online: Webopedia [home, info]
31. Online: Data Formats and Their Sugggested File Extensions [home, info]
32. online: Encyclopedia [home, info]

Medicine (1 matching dictionary)

33. online: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

34. online: Idioms [home, info]

Tech (1 matching dictionary)

35. Online: Web Hosting Glossary [home, info]

Quick definitions from Macmillan ( ) Provided by Quick definitions from Wiktionary (online) ▸ adjective:  Of a generator or power plant: connected to the grid. ▸ adjective:  Of a computer: actively connected to the Internet or to some other communications service. ▸ adjective:  Available over, or delivered from, the Internet. ▸ adjective:  Connected to the Internet. ▸ adjective:  Available on a computer system, even if not networked. ▸ adjective:  Of a system: active, particularly building facilities (such as power) or a factory or power plant. ▸ adjective:  (slang) Immersed in Internet culture. (Usually modified by an intensifier such as extremely or terminally) ▸ adverb:  While online; while in a running or active state, or connected to the Internet. ▸ verb:  (computing, transitive) To bring (a system, etc.) online; to promote to an active or running state. ▸ Word origin ▸ Words similar to online ▸ Usage examples for online ▸ Idioms related to online (New!) ▸ Popular nouns described by online ▸ Words that often appear near online ▸ Rhymes of online ▸ Invented words related to online