The phrase "mainstream" refers to things that are popular or widely accepted by most people in a particular society or culture. It means something that is considered normal or conventional. Full definition
Achievement often requires more than one approach, thus the author gives and overview of the five main streams of the discipline. (religion-online.org)
I would be very interested in main stream media contacting the individual donors and getting some feedback from them as to what their views are. (desmogblog.com)
From main stream brands to popular private label and craft brands. (beautybathandbeyond.com)