subreddit

noun

Etymology: From sub- + Reddit.

1. Any of the subforums, generally intended for discussion of a specific topic, on the Reddit web site.

   “They wanted to give voice to their feeling, in one moderator’s words, that the company’s bosses ‘‘do not respect the work that is put in by the thousands of unpaid volunteers who maintain the communities of the 9,656 active subreddits,’’ as the individual forums are called.”

   “We measure the similarity between entire subreddits both in terms of user similarity and topical similarity.”