Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “radio”

radio

noun [C/U]  /ˈreɪ·diˌoʊ/ (plural radios) us  
a device for receiving, and sometimes broadcasting, sound messages, or the receiving or sending of sound messages: [C] I listen to the radio in the morning to get the weather report. Radio is also the work of broadcasting sound programs for the public to listen to. physics Radio waves are the energy waves of a certain length that are used in radio broadcasts.

radio

verb [I/T]  /ˈreɪ·diˌoʊ/ (present participle radioing, past tense and past participle radioed) us  
to send a message to someone by radio: [I/T] They radioed (their base) for help.
(Definition of radio from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of radio?
Add Cambridge dictionaries to your browser to your website

More American English definitions for “radio”

Definitions of “radio” in other dictionaries

Word of the Day

bright spark

a person who is intelligent, and full of energy and enthusiasm

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More