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

McFarland talked about leaving her job in public affairs at the Pentagon at 34 to raise five kids and deciding to return to the workforce after 9/11, when she was 50.

Read more on The Wall Street Journal

“I was in New York on 9/11, in the sixth grade, but I didn’t visit the site until years later.”

Read more on Los Angeles Times

Following the 9/11 terrorist attacks, federal agencies built an extensive domestic intelligence infrastructure, developed open-source surveillance capabilities, and benefited from new technologies that make monitoring far more granular than ever before.

Read more on Salon

Cheney was one of the most powerful vice-presidents in history, a key architect of Bush's "war on terror" after the 9/11 terrorist attacks, and an early advocate of the invasion of Iraq.

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The 9/11 Commission later claimed to find no evidence that Saddam had collaborated with al Qaeda.

Read more on The Wall Street Journal