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What does 9/11 stand for?

9/11 stands for September 11, 2001 (World Trade Center/Pentagon terrorism attacks)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Slang/chat, popular culture

Samples in periodicals archive:

Families of the victims of the September 11, 2001 attack gathered to remember their lost loved ones.
The exclusion, however, does not apply to deferred compensation that would have been payable after death had the taxpayer not been a terrorist victim or to amounts payable in the taxable year that would not have been payable but for an action taken after September 11, 2001.