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Definitions of defenestration on the Web:

• the act of throwing someone or something out of a window
  wordnetweb.princeton.edu/perl/webwn

• Defenestration were a UK heavy metal band from 1999 to 2004, based in the Northamptonshire town of Kettering.
  en.wikipedia.org/wiki/Defenestration_(band)

• The Defenestrations of Prague were two incidents in the history of Bohemia. The first occurred in 1419 and the second in 1618, although the term "Defenestration of Prague" is more commonly used to refer to the latter incident. Both helped to trigger prolonged conflict within Bohemia and beyond. ...
  en.wikipedia.org/wiki/Defenestrations