Noun | 1. | DoS - the federal department in the UnitedStates that sets and maintains foreign policies; "the Department of State was created in 1789" |
2. | DOS - an operating system that is on a disk Synonyms: disk operating system |
(operating system) | DOS - 1. The common abbreviation for MS-DOS. 2. IBM's Disk Operating System. 3. Any disk operating system. |