Noun:
1: radio, wireless, radiocommunication medium for communication
2: radio receiver, tuner, receiving set, wireless, radio, radio set an electronic receiver that detects and demodulates and amplifies transmitted signals
3: radio, wireless a communication system based on broadcasting electromagnetic waves
Verb:
1: radio transmit messages via radio waves; "he radioed for help"
Adjective:
1: radiant energy, energy, radio indicating radiation or radioactivity; "radiochemistry"