Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun 9-11

1 sense of 9-11

Sense 1
9/11, 9-11, September 11, Sept. 11, Sep 11 -- (the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs)
       INSTANCE OF=> terrorist attack -- (a surprise attack involving the deliberate use of violence against civilians in the hope of attaining political or religious aims)