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2.
The kingdom of Twitter. All the twitter applications, the twitter network, and the twitter people (tweeple) are a part of Twitterdom.
There is much to survey and learn about in Twitterdom.
by bgamall June 09, 2009
 
1.
A particular domain or field of twitter communication.
In the twitterdom of gossip, Ann and Katie are queens
by JosephOduroFrimpong April 22, 2009