What Does Internet Radio Mean?

Internet radio is an audio service that uses the Internet as a distribution medium of broadcasting instead of the traditional radio waves. The proper term used for internet radio is webcasting, as it is not actually broadcast through wireless signals. It is a form of streaming media where content is usually provided live instead of being prerecorded like some podcasts.

Techopedia Explains Internet Radio

Internet radio refers to audio services that are transmitted via the Internet. Most are associated with a traditional radio station that simply streams its content over the internet in simulcast with traditional radio signals.