n.
Function: noun
Inflected Form: plural ra · di · os
Etymology: short for radiotelegraphy
Date: 1903
1 a : the wireless transmission and reception of electric impulses or signals by means of electromagnetic waves b : the use of these waves for the wireless transmission of electric impulses into which sound is converted
2 : a radio message
3 : a radio receiving set
4 a : a radio transmitting station b : a radio broadcasting organization c : the radio broadcasting industry d : communication by radio