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9/11

or 9-11

[ nahyn-i-lev-uhn ]

  1. September 11, 2001: the day on which Islamic terrorists, believed to be part of the Al-Qaeda network, hijacked four commercial airplanes and crashed two of them into the World Trade Center in New York City and a third one into the Pentagon in Virginia: the fourth plane crashed into a field in rural Pennsylvania.


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Word History and Origins

Origin of 9/111

First recorded in 2000–05

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900 number988