I. ˈrā-dē-ˌō adjective
Etymology: radio (II) 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 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
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