Definition of "mainstreaming"

Neither Wales nor Scotland was in favour of getting rid of it, no doubt because both countries have done an infinitely better job than Whitehall on mainstreaming sustainable development.

2010 July 23, Jonathon Porritt, “The greenest government ever? Don't make me laugh”, in The Guardian‎

Mainstreaming implies involving all social actors—governments, civil society, industry and local communities—in the process. Mainstreaming calls for changes in policy as far upstream as possible.

2010, Joyeeta Gupta, Nicolien van der Grijp, editors, Mainstreaming Climate Change in Development Cooperation […] , Cambridge University Press, page 77

It was 1979, and for many educators mainstreaming was an idea whose time had come.

1985 April 14, Barbara Gerbasi, “Mainstreaming My Son”, in The New York Times‎