Blog vs. Web Site?

So my interpretation of a blog vs. a web site is pretty simple. I see a blog as a site where someone posts a thought or discussion, encouraging more thoughts and discussion to gain feedback on that topic. A web site is something I see as a resource for people to share information, products (when looking to sell something), and in some cases attempt to gain the support of others (possibly in the case of a fundraiser. That may be too simplistic, but if I were to sum it up quickly, that would be mow I'd explain it. Thoughts?