Of course, you could always look up words yourself, but I find pretty pictures, and make witty comments.
The Online Etymology Dictionary:
1620, “the action of throwing out of a window,” from L. fenestra “window”. A word invented for one incident: the “Defenestration of Prague,” May 21, 1618, when two Catholic deputies to the Bohemian national assembly and a secretary were tossed out the window (into a moat) of the castle of Hradshin by Protestant radicals.… Related: Defenestrate (1915); defenestrated (1620).
Wikipedia says that there was another, less referenced event, 200 years earlier that also occurred in Prague where SEVEN town officials were thrown from the Town Hall.
Apparently, Catholics attributed the survival of the those defenestrated in 1620 to divine intervention (maybe it actually had something to do with landing in a moat…).
If you jump out of a window, it’s called “self-defenestration”.
It’s a new, fun way to threaten your children: “if you don’t stop fighting, I’m going to self-defenestrate!”