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We found 44 dictionaries with English definitions that include the word IO:
Click on the first link on a line below to go directly to a page where "IO" is defined.

General (22 matching dictionaries)

1. Io: Merriam-Webster.com [home, info]
2. Io: Oxford Learner's Dictionaries [home, info]
3. Io: American Heritage Dictionary of the English Language [home, info]
4. io: Collins English Dictionary [home, info]
5. Io: Vocabulary.com [home, info]
6. IO, I'o, Io, i'o, io, iO: Wordnik [home, info]
7. io: Wiktionary [home, info]
8. Io: Webster's New World College Dictionary, 4th Ed. [home, info]
9. Io: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. io: Infoplease Dictionary [home, info]
11. IO, .io, i.o, io: Dictionary.com [home, info]
12. Io, io: UltraLingua English Dictionary [home, info]
13. IO-, IO (German band), IO (band), IO (disambiguation), IO (film), IO, I.o, Io (Dungeons & Dragons), Io (English band), Io (disambiguation), Io (film), Io (moon), Io (mythology), Io (princely title), Io (programming language), Io, .io: Wikipedia, the Free Encyclopedia [home, info]
14. Io: Online Plain Text English Dictionary [home, info]
15. io: Webster's Revised Unabridged, 1913 Edition [home, info]
16. Io: Rhymezone [home, info]
17. Io, io: AllWords.com Multi-Lingual Dictionary [home, info]
18. IO, .io, io: Stammtisch Beau Fleuve Acronyms [home, info]
19. io: Free Dictionary [home, info]
20. io: Mnemonic Dictionary [home, info]
21. Io: LookWAYup Translating Dictionary/Thesaurus [home, info]
22. Io: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

23. Io: An Etymological Dictionary of Classical Mythology [home, info]
24. io-: A Cross Reference of Latin and Greek Elements [home, info]

Business (5 matching dictionaries)

25. IO: MoneyGlossary.com [home, info]
26. IO, IO, IO: Bloomberg Financial Glossary [home, info]
27. IO: Glossary of research economics [home, info]
28. IO: Comprehensive Financial [home, info]
29. IO: Financial dictionary [home, info]

Computing (2 matching dictionaries)

30. IO, io: Free On-line Dictionary of Computing [home, info]
31. Io: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

32. IO, io: online medical dictionary [home, info]
33. Io, -io: Medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

34. IO: Acronym Finder [home, info]
35. IO: AbbreviationZ [home, info]

Science (4 matching dictionaries)

36. Io: Extragalactic Astronomy [home, info]
37. i.o: PlanetMath Encyclopedia [home, info]
38. io: A Dictionary of Quaternary Acronyms and Abbreviations [home, info]
39. IO: Zoom Astronomy Glossary [home, info]

Slang (1 matching dictionary)

40. IO: Urban Dictionary [home, info]

Tech (4 matching dictionaries)

41. IO: GEOGRAPHIC INFORMATION SYSTEMS, CARTOGRAPHY, AND REMOTE SENSING [home, info]
42. IO: DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations [home, info]
43. IO: Schlumberger Oilfield Glossary [home, info]
44. IO: SeaTalk Dictionary of English Nautical Language [home, info]

Quick definitions from WordNet (Io) ▸ noun:  the closest of Jupiter's moons; has active volcanoes ▸ noun:  (Greek mythology) a maiden seduced by Zeus; when Hera was about to discover them together Zeus turned her into a white heifer ▸ Words similar to IO ▸ Usage examples for IO ▸ Idioms related to IO (New!) ▸ Popular adjectives describing IO ▸ Words that often appear near IO ▸ Rhymes of IO ▸ Invented words related to IO