1. the ideas, attitudes, or activities that are regarded as normal or conventional

1. belonging to or characteristic of the prevailing current of thought, influence, or activity

1. to bring into the mainstream; to make widely accepted or available

Examples

• The band’s sound moved from alternative rock into the mainstream.
• Mainstream media coverage of the event was extensive.
• Her ideas were once considered radical but are now part of the mainstream.
• The school decided to mainstream students with disabilities into regular classrooms.
• Organic food has become increasingly mainstream over the past decade.
• He rejected mainstream fashion in favor of vintage clothing.
• The company hopes to mainstream their innovative technology.