9/11 meaning

UK US

9/11 (noun): the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs.

Definition of 9/11

  1. the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs

    Synonyms: 9-11, September 11, Sept. 11, Sep 11

    Type of: terrorist attack

More about 9/11 on Wikipedia.