We found 18 dictionaries that define the word disk operating system:

General (12 matching dictionaries)

1. disk operating system: Oxford Learner's Dictionaries
2. disk operating system: American Heritage Dictionary of the English Language
3. disk operating system: Collins English Dictionary
4. disk operating system: Vocabulary.com
5. disk operating system: Dictionary.com
6. Disk Operating System, Disk operating system: Wikipedia, the Free Encyclopedia
7. Disk operating system: Rhymezone
8. disk operating system: FreeDictionary.org
9. disk operating system: Mnemonic Dictionary
10. disk operating system: TheFreeDictionary.com
11. disk operating system, Disk operating system: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

12. BusinessDictionary.com (No longer online)

Computing (3 matching dictionaries)

13. Disk Operating System, disk operating system: Free On-line Dictionary of Computing
14. I T Glossary (No longer online)
15. disk operating system: Encyclopedia

Medicine (1 matching dictionary)

16. online medical dictionary (No longer online)

Tech (1 matching dictionary)

17. Space and Electronic Warfare Lexicon (No longer online)

(Note: See disk_operating_systems as well.)

Definitions from Wikipedia (Disk operating system) ▸ noun:  A disk operating system is a computer operating system that resides on and can use a disk storage device, such as a floppy disk, hard disk drive, or optical disc. Opposite: non-DOS, non-Windows, non-Mac, non-Unix Phrases: microsoft disk operating system, realtime disk operating system, more... ▸ Words similar to disk operating system ▸ Usage examples for disk operating system ▸ Idioms related to disk operating system ▸ Wikipedia articles (New!) ▸ Words that often appear near disk operating system ▸ Rhymes of disk operating system ▸ Invented words related to disk operating system