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We found 54 dictionaries with English definitions that include the word radio:
Click on the first link on a line below to go directly to a page where "radio" is defined.

General (32 matching dictionaries)

1. radio, radio-: Merriam-Webster.com [home, info]
2. radio, radio-: Oxford Learner's Dictionaries [home, info]
3. radio, radio-: American Heritage Dictionary of the English Language [home, info]
4. radio, radio-: Collins English Dictionary [home, info]
5. radio: Vocabulary.com [home, info]
6. radio, radio: Macmillan Dictionary [home, info]
7. Radio, radio, radio-: Wordnik [home, info]
8. radio: Cambridge Advanced Learner's Dictionary [home, info]
9. radio, radio-: Wiktionary [home, info]
10. radio, radio-: Webster's New World College Dictionary, 4th Ed. [home, info]
11. radio, radio (radi-): The Wordsmyth English Dictionary-Thesaurus [home, info]
12. radio: Infoplease Dictionary [home, info]
13. Radio-, radio, radio-: Dictionary.com [home, info]
14. radio: Online Etymology Dictionary [home, info]
15. radio: UltraLingua English Dictionary [home, info]
16. radio: Cambridge Dictionary of American English [home, info]
17. RADIO, Radio (Alesha Dixon song), Radio (Darius Rucker song), Radio (Ky-Mani Marley album), Radio (LL Cool J album), Radio (Michael Rother album), Radio (Naked City album), Radio (Rammstein song), Radio (Robbie Williams song), Radio (Steep Canyon Rangers album), Radio (The Corrs song), Radio (Wise Guys), Radio (Wise Guys album), Radio (disambiguation), Radio (film), Radio (magazine), Radio (movie), Radio, The Radio(album), The Radio (Vince Gill song), The Radio: Wikipedia, the Free Encyclopedia [home, info]
18. Radio-: Online Plain Text English Dictionary [home, info]
19. radio-: Webster's Revised Unabridged, 1913 Edition [home, info]
20. radio: Rhymezone [home, info]
21. Radio-, Radio (nt), radio, radio, radio, radio (de), radio (f): AllWords.com Multi-Lingual Dictionary [home, info]
22. Radio: Encarta® Online Encyclopedia, North American Edition [home, info]
23. radio, radio-: Free Dictionary [home, info]
24. radio: Mnemonic Dictionary [home, info]
25. radio: WordNet 1.7 Vocabulary Helper [home, info]
26. radio: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. Radio: The Word Detective [home, info]
28. radio, radio, radio-: Dictionary/thesaurus [home, info]
29. radio: Wikimedia Commons US English Pronunciations [home, info]
30. radio, radio-: MyWord.info [home, info]

Art (1 matching dictionary)

31. radio-: A Cross Reference of Latin and Greek Elements [home, info]

Business (1 matching dictionary)

32. radio: Legal dictionary [home, info]

Computing (3 matching dictionaries)

33. Radio, radio: CCI Computer [home, info]
34. radio: I T Glossary [home, info]
35. radio, radio-: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

36. Radio: Medical Dictionary [home, info]
37. radio, radio-: online medical dictionary [home, info]
38. radio, radio-: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

39. radio: Encyclopedia of Graphic Symbols [home, info]
40. RADIO: Acronym Finder [home, info]
41. Radio: Brilliant Dream Dictionary [home, info]
42. Radio: Army Technology Glossary [home, info]

Science (4 matching dictionaries)

43. radio: Environmental Terminology Discovery Service [home, info]
44. radio: Imagine the Universe! Dictionary [home, info]
45. Radio: Extragalactic Astronomy [home, info]
46. radio: WebElements Periodic Table of the Elements [home, info]

Tech (6 matching dictionaries)

47. radio: Webster's New World Telecom Dictionary [home, info]
48. radio: High-Energy Astrophysics [home, info]
49. Radio: Explosives [home, info]
50. radio: SeaTalk Dictionary of English Nautical Language [home, info]
51. Radio: Latitude Mexico [home, info]
52. Radio: AUTOMOTIVE TERMS [home, info]

(Note: See radios for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (radio) ▸ noun:  a communication system based on broadcasting electromagnetic waves ▸ noun:  medium for communication ▸ noun:  an electronic receiver that detects and demodulates and amplifies transmitted signals ▸ verb:  transmit messages via radio waves ("He radioed for help") ▸ adjective:  indicating radiation or radioactivity ("Radiochemistry") ▸ Also see radios ▸ Word origin ▸ Words similar to radio ▸ Usage examples for radio ▸ Idioms related to radio (New!) ▸ Popular adjectives describing radio ▸ Popular nouns described by radio ▸ Words that often appear near radio ▸ Rhymes of radio ▸ Invented words related to radio