SEPTEMBER 11

 Dictionary entry overview: What does September 11 mean? 

• SEPTEMBER 11 (noun)
  The noun SEPTEMBER 11 has 1 sense:

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

  Familiarity information: SEPTEMBER 11 used as a noun is very rare.

 Dictionary entry details 

• SEPTEMBER 11 (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting time and temporal relations

Synonyms:

9-11; 9/11; Sep 11; Sept. 11; September 11

Instance hypernyms:

terrorist attack (a surprise attack involving the deliberate use of violence against civilians in the hope of attaining political or religious aims)

Domain category:

act of terrorism; terrorism; terrorist act (the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear)

Holonyms ("September 11" is a part of...):

Sep; Sept; September (the month following August and preceding October)

 Context examples 

If your birthday falls on September 11, plus or minus five days, this eclipse will benefit you one way or another, even if you feel occasional tension due to the culminating full moon of January 10.

(AstrologyZone.com, by Susan Miller)