Simple past tense and past participle of mainstream.(verb)
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Use "mainstreamed" in a sentence
"It was "mainstreamed" - and nowhere else were its believers more prominent than in the American media."
"HIV care cannot be "mainstreamed" into primary care, but staff at these facilities often has no formal training in the physiological and psychosocial needs of elders with HIV."
"CNN "mainstreamed" FOX's story without addressing its partisan distortions, ColorOf Change officials wrote."