mainstream What is the Definition of mainstream?Noun:the prevailing current of thought Other meanings of mainstream (synonyms, cognates). ENRU mainstream основнойпоток Frequently viewed: play meaningdownstream meaningobvious meaningmaterial meaningdefinition of broadthroughout meaninghopefully in a sentencefortunately meaningvast definitiontend definitionmoney definitionanswer in a sentence 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