Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

radio

play
adjective ra·dio \ˈrā-dē-ˌō\

Definition of radio

  1. 1 :  of, relating to, or operated by radiant energy

  2. 2 :  of or relating to electric currents or phenomena (as electromagnetic radiation) of frequencies between about 3000 hertz and 300 gigahertz

  3. 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



Origin of radio

2radio or radio-


First Known Use: 1887

Other Telecommunications Terms

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


2

radio

noun ra·dio

Simple Definition of radio

  • : 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

Full Definition of radio

plural ra·di·os

  1. 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. 2 :  a radio message

  3. 3 :  a radio receiving set

  4. 4 a :  a radio transmitting station b :  a radio broadcasting organization c :  the radio broadcasting industry d :  communication by radio

Examples of radio

  1. The news was sent by radio.

  2. I listen to the radio all the time.

  3. I heard the news on the radio.

  4. There's a problem with the car's radio.

  5. The radio was playing very loudly.

  6. The pilot's radio wasn't working.



Origin of radio

short for radiotelegraphy


First Known Use: 1903

Other Telecommunications Terms


3

radio

verb ra·dio

Simple Definition of radio

  • : to send a message to someone by radio

Full Definition of radio

  1. transitive verb
  2. 1 :  to send or communicate by radio

  3. 2 :  to send a radio message to

  4. intransitive verb
  5. :  to send or communicate something by radio

Examples of radio

  1. The police radioed for backup.

  2. The stranded sailors were radioing for help.

  3. The pilot radioed in to the control tower.

  4. The police radioed a report back to the station.

  5. They radioed the Coast Guard for help.



1913

First Known Use of radio

1913

Other Telecommunications Terms


radio-

ra·dio

Definition of radio-

  1. see radi-






Seen and Heard

What made you want to look up radio? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 5, 2016

bread traditionally eaten on Shabbat

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift kittly-benders duvet pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ