Defenestration is the action of throwing something, especially a person, out of a window. The word comes from the Latin de- (down or away from) and fenestra (window or opening).
The word comes from two events in history that took place in Prague. In 1419, seven town officials were thrown from the town hall, which started the Hussite War. In 1618, two Imperial governors and their secretary were thrown from Prague Castle, which started the Thirty Years War. Both events, particularly the one in 1618, were called the Defenestration of Prague and gave rise to the word and to the idea.

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