ADJ. cultural, educational, political, etc.
VERB + MAINSTREAM enter, join | cut sb/sth off from, exclude sb/sth from These teachers have been cut off from the mainstream of educational activity.
MAINSTREAM + NOUN society | education, schools | parties, politics | art, cinema | media
PREP. in/within the ~ He was in the mainstream of British contemporary music. | into the ~ This technology was designed for specialists but is now starting to move into the mainstream. | out of/outside the ~ He drifted out of the mainstream of society.
PHRASES part of the mainstream This style of drama is not part of the mainstream.