Tuesday evening, I had a discussion on this very topic with a few luminaries of the blogging world at a dinner organized by David Teten. People’s various definitions included the following characteristics:
– Syndication – via RSS or or similar tools
– Connectedness – This was brought forth by Ross Dawson. He thought links are the most defining characteristic of blogs.
– Dynamism – The frequent posting of entries
I personally think the line between a "website" and a "blog" is fairly blurry. I’d love to hear different definitions of blogs, if you come across any.