ˈɹeɪdiˌəʊ ˈɹeɪdiˌoʊ ˈwaɪə.ləs ˈwaɪ(ə)ɹ.ləs ˈwaɪə.ləs ˈwaɪ(ə)ɹ.ləs having no wires a wireless security system a communication system based on broadcasting electromagnetic waves an electronic receiver that detects and demodulates and amplifies transmitted signals transmission by radio waves medium for communication