Letters that make Sep 11
s, e, p, 1 are letters that make 'Sep 11'
1 possible definitions for 'Sep 11'
Under this definition, sep 11 is a noun and has the following properties:
9/11, 9-11, September 11, Sept. 11 have the same meaning as 'Sep 11'
'Sep 11' can be considered an instance of terrorist attack.
'Sep 11' can be a category of terrorism, act of terrorism, terrorist act.