We found 23 dictionaries that define the word iOS:

General (10 matching dictionaries)

1. ios: Merriam-Webster
2. iOS: Oxford Learner's Dictionaries
3. IO's, IOs, Io's, Ios, io's, ios: Wordnik
4. Ios, ios, iOS: Wiktionary
5. Ios: Dictionary.com
6. IOS (Apple), IOS (Wii firmware), IOS (disambiguation), IOS (operating system), IOS, IOs, Ios (Island), Ios (island), Ios: Wikipedia, the Free Encyclopedia
7. Ios: Online Plain Text English Dictionary
8. Ios: AllWords.com Multi-Lingual Dictionary
9. IOS, IoS: Stammtisch Beau Fleuve Acronyms
10. ios: FreeDictionary.org

Business (1 matching dictionary)

11. IOS: Financial dictionary

Computing (6 matching dictionaries)

12. IOS: Free On-line Dictionary of Computing
13. IoS: Netlingo
14. IOS (Internetwork Operating System): Linktionary Networking Glossary
15. Webopedia (No longer online)
16. Technopedia (No longer online)
17. IOS (disambiguation), IOS: Encyclopedia

Medicine (1 matching dictionary)

18. online medical dictionary (No longer online)

Miscellaneous (3 matching dictionaries)

19. IOS: Acronym Finder
20. IOS: Three Letter Words with definitions
21. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

22. ios: Urban Dictionary

Tech (1 matching dictionary)

23. IOS: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING

Definitions from Wiktionary (IOS) ▸ noun:  An island in the Cyclades, Greece. ▸ noun:  (computing, mobile telephony) A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware. Similar: Paros, Antiparos, Andros, Mykonos, Ithaca, Ithaka, Icaria, Khios, Folegandros, Cyclades, more... Opposite: android Types: 8, 9, 10, 11, more... Phrases: IOS version history, IOS 16, IOS 15, IOS 12, IOS jailbreaking, more... Adjectives: other, new, based, worth, current, more, extra, small, edi, standard, different Colors:     silver,     space gray,     gold,     rose gold,     midnight green, more... ▸ Words similar to iOS ▸ Usage examples for iOS ▸ Idioms related to iOS ▸ Wikipedia articles (New!) ▸ Popular adjectives describing iOS ▸ Words that often appear near iOS ▸ Rhymes of iOS ▸ Invented words related to iOS