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

Other signatories include Alex Sobel, a leading member of the centre-left Mainstream group, former shadow chancellor John McDonnell and Rachael Maskell, who led a rebellion against benefit cuts last year.

From BBC • Feb. 12, 2026

Mainstream rap is the most radio-friendly and broadly appealing, while experimental rap pushes stylistic boundaries.

From The Wall Street Journal • Feb. 2, 2026

Mainstream opposition parties in Israel have endorsed the plan.

From BBC • Sep. 30, 2025

Mainstream U.S. medical associations have supported gender-affirming care for minors experiencing gender dysphoria for years.

From Los Angeles Times • Aug. 1, 2025

Mainstream use of this term in reference to the cultural and political peculiarities of UC Berkeley as a whole has been reported from as far back as the 1960s.

From The Jargon File, Version 4.2.2, 20 Aug 2000 by Steele, Guy L.