mainstream What is the Definition of mainstream?Noun:the prevailing current of thought Other meanings of mainstream (synonyms, cognates). ENRU mainstream основнойпоток Frequently viewed: definition of hivearray meaningtrouble meaningready meaningengine meaningfeature definitionweight definitionmicrosoft meaningcycle meaningbooth definitiondefinition of particularlyharder meaning 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