mainstream What is the Definition of mainstream?Noun:the prevailing current of thought Other meanings of mainstream (synonyms, cognates). ENRU mainstream основнойпоток Frequently viewed: heart meaningaudience meaningpassion meaningband meaninginvolve meaningstore meaningexperience meaningarithmetic meaningextend meaningdefinition of hearmany definitionrather definition A B C D E F G H I J K L M N O P Q R S T U V W X Y Z