/ˈmeɪnstri:m ||; ˈmenˌstrim/noun [sing] the mainstream the ideas and opinions that are considered normal because they are shared by most people; the people who hold these opinions and beliefs （思想或看法的）主流；持主流看法或信念的人: The Green Party is not in the mainstream of British politics. 绿党不属于英国政治的主流。 mainstream adj