radio

I. adjective Etymology: 2radio or radio- Date: 1887 1. of, relating to, or operated by radiant energy 2. of or relating to electric currents or phenomena (as electromagnetic radiation) of frequencies between about 3000 hertz and 300 gigahertz 3. a. of, relating to, or used in radio or a radio set b. specializing in radio or associated with the radio industry c. (1) transmitted by radio (2) making or participating in radio broadcasts d. controlled or directed by radio II. noun (plural radios) 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 III. verb Date: 1913 transitive verb 1. to send or communicate by radio 2. to send a radio message to intransitive verb to send or communicate something by radio