Of, or relating to people or society at the local level, particularly in politics, social movements, etc.; of the grass roots.
Used or accepted broadly rather than by small portions of a population or market.
That which is common; the norm.
The principal current in a flow, such as a river or flow of air
To become mainstream.
To popularize, to normalize, to render mainstream.
To educate (a disabled student) together with non-disabled students.