| Noun | 1. | radio - medium for communicationSynonyms: radiocommunication, wireless |
| 2. | radio - an electronic receiver that detects and demodulates and amplifies transmitted signals | |
| 3. | radio - a communication system based on broadcasting electromagnetic waves Synonyms: wireless | |
| Verb | 1. | radio - transmit messages via radio waves; "he radioed for help" |
| Adj. | 1. | radio - indicating radiation or radioactivity; "radiochemistry" |
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