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1.
"Television" watched via the internet e.g. YouTube, Hulu, Myspace Video etc.
"You need to get off the computer, that intervision will rot your mind!"
by Kurt 8 Keiner November 10, 2009
 
2.
Its a noun used to describe the internet and the television. Usually used to describe a popular video or something along those lines.
Guy 1: Hey have you heard "Chocolate Rain" by Tay Zonday?
Guy 2: Of course I have! Everyone has heard that song, its all over the intervision.
by bag o douche September 20, 2007