1. (

• radio ,
• radiocommunication ,
• wireless ,

) medium for communication ;

2. (

• wireless

) transmission by radio waves ;

3. (

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

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

4. (

• radio ,
• wireless

) a communication system based on broadcasting electromagnetic waves ;

1. (

• wireless

) having no wires; "a wireless security system" ;