DOS > define
noun
- The federal department in the United States that sets and maintains foreign policies.
- usage: "the Department of State was created in 1789"
- An operating system that is on a disk.
- synonyms: disk operating system
by WordNet 3.0 © 2006 by Princeton University
(Military) DOS stands for one of the following: date of separation; days of supply; denial of service; Department of State; disk operating system
by Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.