student asking question

What's "on" mean here? When's it used like this?

teacher

Native speaker’s answer

Rebecca

In the context of entertainment like TV shows or music, to be "on" means to be playing or airing. In this case, "Idol's on" is used to mean that American Idol is on TV, it is being aired. Ex: Your favorite song is on the radio! Ex: There's a cool show on TV right now.

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