9/11
/ˌnaɪn.əˈlɛ.vən/ proper noun, noun
Forms 9/11s nine-eleven
- proper noun September 11, 2001; The date of the attacks on the World Trade Center and the Pentagon in the United States.
- proper noun (metonymic) The attacks themselves.
- noun An event comparable to the September 11 attacks.
- noun (Internet slang, humorous) A 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.”
Synonyms
Etymology
From the date September 11 written numerically with the notation used in the United States, in the month–day format.
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “9/11”, CC BY-SA 4.0. Details