0 forms of the media, especially traditional forms such as newspapers, television, and radio rather than the internet, that influence large numbers of people and are likely to represent generally accepted beliefs and opinions:
If you relied exclusively on the mainstream media for the news, you wouldn't know this had ever happened.
We don't need the mainstream media to foment chaos and divisiveness.
They are conspiracy theorists who believe that a left-leaning mainstream media is ranged against them.
Mainstream media have become increasingly reliant on social media for their research and reporting.