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Noun
1. newsgroup (on Usenet)Computing
Wikipedia definition
2. Usenet newsgroupA Usenet newsgroup is a repository usually within the Usenet system, for messages posted from many users in different locations. The term may be confusing to some, because it is usually a discussion group. Newsgroups are technically distinct from, but functionally similar to, discussion forums on the World Wide Web. Newsreader software is used to read newsgroups. Newsgroups are much like the public message boards on old bulletin board systems.
Read “Usenet newsgroup” on English Wikipedia
Read “ニュースグループ” on Japanese Wikipedia
Read “Usenet newsgroup” on DBpedia

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