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)
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.
(Definition of radio noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of radio

More American English definitions for “radio”

Definitions of “radio” in other dictionaries

Word of the Day

exercise

physical activity that you do to make your body strong and healthy

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More