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

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Top Definition
A Twitter Dom is a man who uses a black and white photo of himself in a suit and tie, showing only from the chin down to chest. They derive from the 50 Shades of Grey trend and personify a "Dom" persona on their account. In reality, they are usually middle aged men wearing fanny packs on family vacations or teenage boys who are "Domming" their "Littles" between rounds of Xbox.
Your Twitter Dom pushes his peas under his mashed potatoes and yells "Done!"
by Fugdashig45 April 15, 2017

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A particular domain or field of twitter communication.
In the twitterdom of gossip, Ann and Katie are queens
by JosephOduroFrimpong April 22, 2009

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