<p><strong>Noun:</strong></p><ul><li>The principal or dominant course, tendency, or trend: the mainstream of American culture.</li><li>A river having tributaries.</li><li>Regular school classes or regular schools: keeping autistic students in the mainstream.</li></ul><p><strong>Adjective:</strong></p><ul><li>Belonging to or characteristic of a principal, dominant, or widely accepted group, movement, style, etc.: mainstream Republicans; a mainstream artist; mainstream media.</li><li>Of, relating to, or characteristic of jazz falling historically between Dixieland and modern jazz; specifically, swing music.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>To send into the mainstream; cause to join the main force, group, etc.: to mainstream young people into the labor force; to place (students with disabilities) in regular school classes.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To join or be placed in the mainstream.</li></ul><p><strong>End of Response</strong></p>