The act of throwing something or especially someone out of a window, especially lethally.
The "Defenestration" at Prague (A.D. 1618). [...] The imperial Austrian Councillors are thrown out of the window of the castle of Hradschin by the enraged Bohemian Deputies [...]
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(Britain) The high-profile removal of a person from an organization.
The Third Defenestration of Prague occurred on 10 March 1948. During the closing stages of the communist takeover in Czechoslovakia, Jan Masaryk, the popular foreign minister and son of [[w:Tomáš Garrigue Masaryk
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(computing, humorous) The act of removing the Microsoft Windows operating system from a computer in order to install an alternative one.
On September 11, 2001 when NYC's Twin Towers were impacted [...] some occupants trapped above the inferno facing certain death instead jumped from windows to their certain death (self defenestration).
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