First Known Use: 1887
Dictionary
1radio
adjective ra·dio \ˈrā-dē-ˌō\
Definition of RADIO
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
ADVERTISEMENT
Origin of RADIO
2radio or radio-
Rhymes with RADIO
acid snow, afterglow, aikido, alpenglow, apropos, art deco, art nouveau, audio, Baguio, Bamako, barrio, bay window, Bergamo, bibelot, Bilbao, black widow, blow-by-blow, body blow, bone marrow, bordereau, Borneo, bow window, buffalo, Buffalo, bungalow, Bushido, buteo, calico, cameo, cachalot, cembalo, centimo, CEO, chassepot, cheerio, Clemenceau, cogito, comedo, comme il faut, counterflow, Cupid's bow, curaçao, Curaçao, curassow, curio, daimyo, danio, Delano, Diderot, do-si-do, domino, dynamo, embryo, entrepôt, Erato, escargot, Eskimo, extrados, fabliau, folio, French window, fricandeau, furbelow, gigolo, golden glow, go-no-go, grass widow, guacharo, hammer throw, hammertoe, haricot, heel-and-toe, hetero, high and low, HMO, Holy Joe, horror show, Idaho, in a row, indigo, in escrow, in the know, Jericho, kakapo, latigo, little toe, long-ago, Longfellow, Maceió, Maginot, Manchukuo, medico, Mexico, mistletoe, modulo, Monaco, Navajo, NCO, nuncio, oleo, olio, on tiptoe, Oreo, overflow, overgrow, overthrow, ovolo, Pamlico, Papago, paseo, picaro, piccolo, Pierrot, polio, pomelo, pompano, portico, PPO, Prospero, proximo, quid pro quo, raree-show, ratio, Richard Roe, Rochambeau, rococo, rodeo, Romeo, rose window, round window, saddlebow, Sapporo, sapsago, Scapa Flow, Scipio, Scorpio, semipro, show window, sloppy joe, so-and-so, SRO, standing O, status quo, stereo, stop-and-go, studio, subito, tallyho, tangelo, Taranto, tic-tac-toe, TKO, to-and-fro, Tokyo, tombolo, touch-and-go, tournedos, tremolo, tuckahoe, tupelo, UFO, ultimo, undergo, undertow, Veneto, vertigo, vibrio, video, virago, vireo, Zhangjiakou, zydeco
2radio
noun
: the system or process that is used for sending and receiving signals through the air without using wires
: programs that are broadcast by radio
: a device that is used to receive the signals that are broadcast by radio
plural ra·di·os
Full Definition of RADIO
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
See radio defined for English-language learners
See radio defined for kids
Origin of RADIO
short for radiotelegraphy
First Known Use: 1903
3radio
verb
: to send a message to someone by radio
Full Definition of RADIO
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
See radio defined for English-language learners
First Known Use of RADIO
1913
RADIO- Defined for Kids
1radio
noun ra·dio \ˈrā-dē-ˌō\
plural ra·di·os
Definition of RADIO for Kids
1
: the process that is used for sending or receiving signals by means of electromagnetic waves without a connecting wire
2
: a device that receives signals sent by radio
3
: programs that are broadcast by radio
4
: a device used to both send and receive messages by radio
5
: the radio broadcasting industry
2radio
adjective
Definition of RADIO for Kids
1
: of or relating to radio waves
2
: of, relating to, or used in radio broadcasting
3radio
verb
ra·di·oedra·di·o·ing
Definition of RADIO for Kids
: to communicate or send a message to by radio
Learn More About RADIO
Browse
ADVERTISEMENT
Seen & Heard
What made you want to look up radio? Please tell us where you read or heard it (including the quote, if possible).