That which is common; the norm.
The principal current in a flow, such as a river or flow of air
Used or accepted broadly rather than by small portions of a population or market.
To become mainstream.
To popularize, to normalize, to render mainstream.
To educate (a disabled student) together with non-disabled students.
Not adhering to convention or accepted standards
Atypical
Out of the ordinary
Something or someone that is unconventional.