9/11

From the date September 11 written in numbers according the format used in the United States, which puts the month before the day.

• IPA^(key): /naɪn.əˈlɛvən/
• Rhymes: -ɛvən

• /naɪn.wʌnˈwʌn/ is usually used for the telephone number 911 instead of the date.

• 911
• 9-11
• nine-eleven

9/11

1. The date of the attack on the Twin Towers and the Pentagon in the USA, September 11th, 2001.
2. The attack itself.
   • 2014 November 17, Roger Cohen, “The horror! The horror! The trauma of ISIS [print version: International New York Times, 18 November 2014, p. 9]”, in The New York Times‎:

     What is unbearable, in fact, is the feeling, 13 years after 9/11, that America has been chasing its tail; that, in some whack-a-mole horror show, the quashing of a jihadi enclave here only spurs the sprouting of another there; that the ideology of Al Qaeda is still reverberating through a blocked Arab world whose Sunni-Shia balance (insofar as that went) was upended by the American invasion of Iraq.

9/11 (plural 9/11s)

1. An event comparable to 9/11.
   • 2005 , Peter H. Merkl, The Rift Between America And Old Europe: The Distracted Eagle, Routledge, page 73.

     Eleven million Spaniards responded to "their 9/11" by demonstrating in the rain against terrorism and their government's policies.

   • 2006, The Age

     Moussaoui says he wants more 9/11s

   • 2006, Michael Weissenstein, "Nations respond to their '9/11s'"

     But experts who have studied these other "9/11s" say some offer important revelations, by comparison, about how America responded to its own.

   • 2007, David E. Long, Bernard Reich, Mark Gasiorowski, The Government and Politics of the Middle East and North Africa.

     Jordanians referred to this horrific event as "their 9-11 ".

• Wikipedia article on 9/11
• https://web.archive.org/web/20070206082335/http://sep11memories.org/wiki/In_Memoriam formerly the WMF 9/11 memorial
• Appendix:American Dialect Society words of the year