1main·stream 
/ˈmeɪnˌstri:m/ noun
/ˈmeɪnˌstri:m/ noun Meaning:
the mainstream
: the thoughts, beliefs, and choices that are accepted by the largest number of people
▪ His ideas are well outside the mainstream of political opinion. = His ideas are well outside the political mainstream.
▪ His ideas are well outside the mainstream of political opinion. = His ideas are well outside the political mainstream.
— mainstream adjective [more mainstream; most mainstream]
▪ mainstream medicine [=the type of medicine that is most widely practiced and accepted] ▪ mainstream movies ▪ Advertisers are trying to attract a more mainstream audience.
▪ mainstream medicine [=the type of medicine that is most widely practiced and accepted] ▪ mainstream movies ▪ Advertisers are trying to attract a more mainstream audience.
