1. (

• radio ,
• radiocommunication ,
• wireless ,

) medium for communication ;

2. (

• radio_receiver ,
• receiving_set ,
• radio_set ,
• radio ,
• tuner ,
• wireless ,

) an electronic receiver that detects and demodulates and amplifies transmitted signals ;

3. (

• radio ,
• wireless

) a communication system based on broadcasting electromagnetic waves ;

1. (

• radio

) transmit messages via radio waves; "he radioed for help" ;

1. (

• radio

) indicating radiation or radioactivity; "radiochemistry" ;