We found 34 dictionaries that define the word newsgroup:

General (16 matching dictionaries)

1. newsgroup: Longman Dictionary of Contemporary English
2. newsgroup: Merriam-Webster
3. newsgroup: Oxford Learner's Dictionaries
4. newsgroup: American Heritage Dictionary of the English Language
5. newsgroup: Collins English Dictionary
6. Newsgroup, newsgroup: Wordnik
7. newsgroup: Cambridge Advanced Learner's Dictionary
8. newsgroup: Wiktionary
9. newsgroup: Webster's New World College Dictionary, 4th Ed.
10. newsgroup: Infoplease Dictionary
11. newsgroup: Dictionary.com
12. Newsgroup: Wikipedia, the Free Encyclopedia
13. newsgroup: Stammtisch Beau Fleuve Acronyms
14. newsgroup: TheFreeDictionary.com

Business (2 matching dictionaries)

15. Broadcast Media Terms (No longer online)
16. BusinessDictionary.com (No longer online)

Computing (10 matching dictionaries)

17. newsgroup: Free On-line Dictionary of Computing
18. newsgroup: CCI Computer
19. CNET Internet Glossary (No longer online)
20. Newsgroup: Tech Terms Computer Dictionary
21. Newsgroup: ILC Internet Terms
22. Internet Terms (No longer online)
23. Internet Terms (No longer online)
24. Webopedia (No longer online)
25. Data Formats and Their Sugggested File Extensions (No longer online)
26. newsgroup: Encyclopedia

Medicine (3 matching dictionaries)

27. online medical dictionary (No longer online)
28. newsgroup: Prostate Cancer Interactive Glossary
29. newsgroup: Medical dictionary

Slang (1 matching dictionary)

30. newsgroup: Urban Dictionary

Tech (2 matching dictionaries)

31. newsgroup: Webster's New World Telecom Dictionary
32. Newsgroup: Web Hosting Glossary

Definitions from Wiktionary ( ) ▸ noun:  A repository on a computer network where people can post messages, usually about a single subject. Similar: news, netnews, Usenet, posting, chatgroup, newsreader, newsboard, e-group, subforum, Internet forum, more... Opposite: mailing list, forum, message board, discussion board Types: mailing list, discussion group, message board, more... Phrases: Usenet newsgroup, moderated newsgroup, newsgroup charter, more... Adjectives: usenet, particular, moderated, new, current, appropriate, specific, next, entire, single, public Colors:     blue,     gray,     white,     black,     red, more... ▸ Words similar to newsgroup ▸ Usage examples for newsgroup ▸ Idioms related to newsgroup ▸ Wikipedia articles (New!) ▸ Popular adjectives describing newsgroup ▸ Words that often appear near newsgroup ▸ Rhymes of newsgroup ▸ Invented words related to newsgroup