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.

9-11

1. See September 11 attacks .

Word History and Origins

Origin of 9/11¹

First recorded in 2000–05

Example Sentences

In 2021, the Taliban regained power in Afghanistan, 20 years after a US-led invasion toppled their regime in the fallout of the 9/11 attacks in New York.

From BBC

According to him, 9/11 was an inside job, the Boston Marathon bombing was staged by the FBI and the shooting of former Arizona Congresswoman Gabrielle Giffords was part of a clandestine mind-control operation.

From Los Angeles Times

After 9/11, George W. Bush authorized the indefinite detention of prisoners in what came to be known as the Global War on Terror.

From Salon

The 9/11 terrorist attacks and the inevitably ensuing debacles in Afghanistan and Iraq stoked a strange mental syndrome made up of fear and grandiosity.

From Salon

Don't forget that the only time that NATO’s Article 5 has been invoked was by the United States, when we came to your support after 9/11.

From Salon