Meanings
proper noun
- The terrorist attacks that happened on September 11, 2001.
Synonyms: 9/11, September eleventh
Synonyms & antonyms
proper nounThe terrorist attacks that happened on September 11, 2001.
Similar
Origin
From the date, by metonymy.
Full word history & related roots →Cite this entry
APA
September 11. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/September%2011
MLA
“September 11.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/September%2011. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “September 11,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/September%2011.
Source: September 11 on Wiktionary, CC BY-SA 4.0.