mainstream

American  

[meyn-streem] / ˈmeɪnˌstrim /

noun

1. the principal or dominant course, tendency, or trend.

   the mainstream of American culture.

2. a river having tributaries.

3. regular school classes or regular schools.

   keeping autistic students in the mainstream.

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adjective

1. belonging to or characteristic of a principal, dominant, or widely accepted group, movement, style, etc..

   mainstream Republicans;

   a mainstream artist;

   mainstream media.

2. of, relating to, or characteristic of jazz falling historically between Dixieland and modern jazz; specifically, swing music.

verb (used with object)

1. to send into the mainstream; cause to join the main force, group, etc..

   to mainstream young people into the labor force.

2. to place (students with disabilities) in regular school classes.

verb (used without object)

1. to join or be placed in the mainstream.

mainstream British  

/ ˈmeɪnˌstriːm /

noun

1. 1. the main current (of a river, cultural trend, etc)

      in the mainstream of modern literature

   2. ( as modifier )

      mainstream politics

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adjective

1. of or relating to the style of jazz that lies between the traditional and the modern

mainstream Cultural  

1. The prevailing current or direction of a movement or influence: “The candidate's speech represented the mainstream thinking on economic policy.”

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Etymology

Origin of mainstream

First recorded in 1660–70; main ¹ + stream

Explanation

Mainstream describes what's viewed by most people in a society as "normal," like the mainstream view that everyone should get married, move to the suburbs, and have children as soon as they can. Something that's mainstream is conventional, or the usual way of doing things. If you're talking about the mainstream in fashion, you mean the ordinary clothes that most people wear and which is found in all the malls — nothing too weird or outlandish. In the 1600s, mainstream described the prevailing current of a river, with the first recorded use of its meaning of prevailing taste or opinion in 1831.

Example Sentences

In fact, 42% of Americans use a VPN, making it no longer a niche privacy tool but a mainstream one.

From Salon • Jun. 10, 2026

“More mainstream people are going to be in on the R2, especially for the lower-priced models,” auto analyst Brian Moody said.

From Los Angeles Times • Jun. 10, 2026

Alex Papadopoulos, president of Egea SRI, says renewable energy has become profitable and globally mainstream in the past three years.

From Barron's • Jun. 10, 2026

All along, the moment shows, capable thinkers have still been able to find doors into the mainstream media, not to mention doors to new kinds of visibility via YouTube, X and Substack.

From The Wall Street Journal • Jun. 9, 2026

There was massive access to new kinds of media that hadn’t existed in the mainstream just five years earlier.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel