1. 
   USAF
   acronym: United States Air Force
   Found op http://cdiac.ornl.gov/pns/acronyms.html#U
   
   
2. 
   USAF
   abbreviation: United States Air Force
   Found op http://www.apscharts.com/abbrev.html
   
   
3. 
   USAF
   United States Air Force.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
4. 
   USAF
   United States Air Force
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
5. 
   USAF
   United States Air Force
   Found op http://en.wikipedia.org/wiki/List_of_U.S._government_and_military_acronyms
   
   
6. 
   usaf
   1) Abbr. on a b-52 2) Abbr. on a jet 3) Academy in colorado springs, colo. 4) Air force 5) Air service 6) Airforce 7) B-1 insignia 8) B-1 letters 9) B-2 letters 10) B-52 org. 11) Bomber initials 12) Colo. acad. 13...
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/usaf/1
   
   

Tip: double click on a word to show its meaning.