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1.
Noun.

A conversation exclusively held via e-mail, often occurring in real-time. One user may refresh his inbox repeatedly waiting for a reply to continue the conversation.

Gmail and Gchat blur the distinction between IMing and e-mailing noticeably.
"Hey, listen, I really can't make this a mailversation. You're clogging up my Hotmail."

"I had a hot mailversation with Susan last night: you should see all the dirty pics she e-mailed me!"
by HandJobLover April 16, 2010