We found 41 dictionaries that define the word operating system:

General (19 matching dictionaries)

1. operating system: Longman Dictionary of Contemporary English
2. operating system: Merriam-Webster
3. operating system: Oxford Learner's Dictionaries
4. operating system: American Heritage Dictionary of the English Language
5. operating system: Collins English Dictionary
6. operating system: Vocabulary.com
7. operating-system: Wordnik
8. operating system: Cambridge Advanced Learner's Dictionary
9. operating-system, operating system: Wiktionary
10. operating system: Infoplease Dictionary
11. operating system: Dictionary.com
12. Operating System, Operating system: Wikipedia, the Free Encyclopedia
13. operating system: Rhymezone
14. operating system: AllWords.com Multi-Lingual Dictionary
15. operating system: FreeDictionary.org
16. operating system: Mnemonic Dictionary
17. operating system: TheFreeDictionary.com

Art (1 matching dictionary)

18. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Business (3 matching dictionaries)

19. operating system: Legal dictionary
20. Accounting, Business Studies and Economics Dictionary (No longer online)
21. BusinessDictionary.com (No longer online)

Computing (12 matching dictionaries)

22. operating system: Free On-line Dictionary of Computing
23. operating system: Netlingo
24. Operating System, operating system: CCI Computer
25. Operating System: Cybernetics and Systems
26. CNET Internet Glossary (No longer online)
27. operating system: Computer Telephony & Electronics Dictionary and Glossary
28. Operating System: Tech Terms Computer Dictionary
29. Webopedia (No longer online)
30. operating system: Hacking Lexicon
31. I T Glossary (No longer online)
32. Technopedia (No longer online)
33. operating system: Encyclopedia

Medicine (2 matching dictionaries)

34. online medical dictionary (No longer online)
35. operating system: Medical dictionary

Slang (1 matching dictionary)

36. operating system: Urban Dictionary

Tech (3 matching dictionaries)

37. Embroidery Glossary (No longer online)
38. Sweetwater Music (No longer online)
39. Operating system: Web Hosting Glossary

(Note: See operating_systems as well.)

Definitions from Wiktionary (operating system) ▸ noun:  (computing, software) Software that is designed for controlling the allocation and the use of various hardware resources to tasks and remote terminals. Similar: OS, system software, systems software, system, utility program, system operator, systems programming, utility, sysop, world, more... Opposite: user software, end-user software Types: Windows, Mac, Linux, Chrome, more... Phrases: Disk operating system, microsoft disk operating system, unix operating system, Network operating system, Real-time operating system, more... Adjectives: core, twain, directory, environmental, client-server, pent, peripheral, cocoa, external, back-end, deskside ▸ Words similar to operating system ▸ Usage examples for operating system ▸ Idioms related to operating system ▸ Wikipedia articles (New!) ▸ Words that often appear near operating system ▸ Rhymes of operating system ▸ Invented words related to operating system