The 2014 Social Media Glossary: 154 Essential Definitions by Matt Foulger.
From the post:
Welcome to the 2014 edition of the Hootsuite Social Media Glossary. This is a living document that will continue to grow as we add more terms and expand our definitions. If there’s a term you would like to see added, let us know in the comments!
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I searched but did not find an earlier version of this glossary on the Hootsuite blog. I have posted a comment asking for pointers to the earlier version(s).
In the meantime, you may want to compare: The Ultimate Glossary: 120 Social Media Marketing Terms Explained by Kipp Bodnar. From 2011 but if you don’t know the terms, even a 2011 posting may be helpful.
We all accept the notion that language evolves but within domains that evolution is gradual and as thinking in that domain shifts, making it harder for domain members to see it.
Tracking a rapidly changing vocabulary, such as the one used in social media, might be more apparent.