9/11

/ˌnaɪn.əˈlɛ.vən/

proper noun

September 11, 2001; The date of the attacks on the World Trade Center and the Pentagon in the United States.

“This was my 9/11.”

Meanings

proper noun

alternative 911 · alternative 9-11 · alternative nine-eleven

  1. September 11, 2001; The date of the attacks on the World Trade Center and the Pentagon in the United States.

    Synonyms: September eleventh

  2. metonymicallyThe attacks themselves.

    Republican front-runner twisted his arms in apparent imitation of Serge Kovaleski’s arthrogryposis as he reiterated controversial 9/11 claims

    2015 November 26, Claire Phipps, “New York Times slams 'outrageous' Donald Trump for mocking reporter's disability”, in The Guardian, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 26 Mar 2025
    3 more examples

    Hey, for the ninth consecutive year, Nick, JetBlue Airlines ranked first for satisfaction among all North American airlines. But, you know what ranked least in satisfaction? 9/11 Airlines. What a terrible name for an airline; it reminds me of that tragedy.

    2013 May 21, Norm Macdonald Live, season 3, episode 11 (comedy), spoken by Norm Macdonald

    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.

    2014 November 17, Roger Cohen, “The horror! The horror! The trauma of ISIS”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 10 Jun 2021

    As someone who studies the impact of misinformation on society, I often wish the young entrepreneurs of Silicon Valley who enabled communication at speed had been forced to run a 9/11 scenario with their technologies before they deployed them commercially.

    2019 September 1, Claire Wardle, “Misinformation Has Created a New World Disorder”, in Scientific American, archived from the original on 01 Apr 2025

    Synonyms: September eleventh

noun9/11 (plural 9/11s)

plural 9/11s · alternative 911 · alternative 9-11 · alternative nine-eleven

  1. An event comparable to the September 11 attacks.

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

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

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

    2005, Peter H. Merkl, The Rift Between America And Old Europe: The Distracted Eagle, Routledge, page 73

    "I thought about ... the consequences for me saying I was a part of 9/11. I decided to just put my trust in God and tell the truth and time will tell," he said.

    2006 April 14, “Moussaoui says he wants more 9/11s”, in The Age, archived from the original on 24 Jan 2022

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

    2006, Michael Weissenstein, “Nations respond to their '9/11s'”, in International Institute for Strategic Studies, archived from the original on 08 Apr 2008

    Drawing a US analogy, he said the weekend’s attack, for Israel, “could be a 9/11 and a Pearl Harbor wrapped into one”.

    2023 October 9, Ben Doherty, “Israel military says situation ‘dire’ in south as 260 bodies retrieved from festival”, in Katharine Viner, editor, The Guardian, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 04 Nov 2023
  2. InternetexcessivehumorousA negative event that a person or a group of people have experienced whose impact is, hyperbolically, comparable to that of the September 11 attacks.

    This was my 9/11.

    1 more example

    9/11 for unfunny people

Synonyms & antonyms

proper nounSeptember 11, 2001; The date of the attacks on the World Trade Center and the Pentagon in the United States.

proper nounThe attacks themselves.

Origin

From the date September 11 written numerically with the notation used in the United States, in the month–day format.

Full word history & related roots →

Translations

Chinese Mandarin 九一一事件, 9·11事件
  • 九一一事件 (Jiǔ-yāo-yāo Shìjiàn)September 11 attacks
  • 9·11事件 (Jiǔ-yāo-yāo Shìjiàn)September 11 attacks
Danish 11. september
  • 11. septemberSeptember 11 attacks
Finnish WTC-isku
  • WTC-iskuSeptember 11 attacks
French 11 septembre
  • 11 septembreSeptember 11 attacks
German 11. September
  • 11. SeptemberSeptember 11 attacks
Hindi ९/११ (9/11), ९/११ हमले
  • ९/११ (9/11)September 11 attacks
  • ९/११ हमले (9/11 hamle)September 11 attacks
  • २६/११ (26/11)event comparable to 9/11
Japanese 9・11, アメリカ同時多発テロ
  • 9・11 (kyū ichi ichi)September 11 attacks
  • アメリカ同時多発テロSeptember 11 attacks
Polish 11 września, 11 września
  • 11 wrześniaSeptember 11 attacks
  • 11 wrześniaevent comparable to 9/11
Portuguese Onze de Setembro, 11 de Setembro
  • Onze de SetembroSeptember 11 attacks
  • 11 de SetembroSeptember 11 attacks
  • Onze de Setembroevent comparable to 9/11
  • 11 de Setembroevent comparable to 9/11
Spanish 11S, 11-S
  • 11SSeptember 11 attacks
  • 11-SSeptember 11 attacks
  • 11Sevent comparable to 9/11
  • 11-Sevent comparable to 9/11
Swedish 11 september-attackerna
  • 11 september-attackernaSeptember 11 attacks
Turkish onbir eylül, 11 eylül
  • onbir eylülSeptember 11 attacks
  • 11 eylülSeptember 11 attacks

Rhymes & wordplay

Rhymes with 9/11

All rhymes →
Cite this entry
APA

9/11. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/9%2F11

MLA

“9/11.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/9%2F11. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “9/11,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/9%2F11.

Source: 9/11 on Wiktionary, CC BY-SA 4.0.