For me "social" suggests that people use it to "socialize". Keep contact with old friends, find new ones etc. Reddit or Hacker News don't fit into that category

For me "social" suggests that people use it to "socialize". Keep contact with old friends, find new ones etc. Reddit or Hacker News don't fit into that category for me. If we say that any website with user generated content is "social media", then half of the web is that and the term kind of loses meaning.