1A radio for receiving analogue signals which incorporates either a digital tuning mechanism or a digital display (or frequently both). Now rare. Compare digital tuning , "digital".
2A radio for receiving digital radio signals.
The radio transmission of audio signals that have been digitally encoded, especially for the purposes of broadcasting.
Digital radio provides better fidelity than analogue radio and allows more channels to be contained within a particular bandwidth.
1970s; earliest use found in Kokomo (Indiana) Tribune. From digital + radio.