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 practice, the sequence highlights a broader shift in late-night television culture: from singular network platforms toward dispersed, hybrid appearances that blur the line between mainstream entertainment, local programming, and internet-native performance.

From Salon • May 23, 2026

To see just how far ETFs have drifted from the investment mainstream, look at the Tuttle Capital UFO Disclosure ETF.

From The Wall Street Journal • May 22, 2026

They'd been to the mainstream prom retailers and cost, of course, was an issue for them.

From BBC • May 21, 2026

“I started the club back when fragrance’s popularity was still pretty niche, and now seeing it move into the mainstream is really exciting,” says Washington-Harmon.

From Los Angeles Times • May 19, 2026

I was asking Dad how many fans it took to make something move from being side- stream to mainstream when Kat reappeared brandishing a plastic bottle of blue liquid.

From "The London Eye Mystery" by Siobhan Dowd