If there's any word that I have been so confused with, it's got to be meta. I have seen a few places where it's used in entirely different ways.
Meta sites: Here, meta means discussion about the site's working and policies.
Meta tags: Here, meta means unclassifiable, since meta tags can't be used to classify questions into specialized concepts.
This post is way too meta IMO: I've seen this being used a lot but I have no idea what it means.
Is this all, or are there other meanings to the word "meta"?