Mainstream vs. Arcane

Mainstream and Arcane Definitions
Mainstream
The prevailing current of thought, influence, or activity
"You need not accept the nominee's ideology, only be able to locate it in the American mainstream" (Charles Krauthammer).
Arcane
Known or understood by only a few
Arcane economic theories.
Mainstream
Representing the prevalent attitudes, values, and practices of a society or group
Mainstream morality.
Arcane
Understood by only a few.
Arcane rituals
Mainstream
To integrate (a student with special needs) into regular school classes.
Arcane
(by extension) Obscure, mysterious.
Arcane origins
Arcane details
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Mainstream
To incorporate into a prevailing group.
Arcane
Requiring secret or mysterious knowledge to understand.
Mainstream
Used or accepted broadly rather than by small portions of a population or market.
They often carry stories you won't find in the mainstream media.
Arcane
Extremely old (e.g. interpretation or knowledge), and possibly irrelevant.
Mainstream
The principal current in a flow, such as a river or flow of air
Arcane
Hidden; secret.
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Mainstream
That which is common; the norm.
Ideas outside of the mainstream
Arcane
Requiring secret or mysterious knowledge;
The arcane science of dowsing
Mainstream
(transitive) To popularize, to normalize, to render mainstream.
Mainstream
(intransitive) To become mainstream.
Mainstream
To educate (a disabled student) together with non-disabled students.
Mainstream
The prevailing opinion or practise; as, the doctor avoided using therapies outside the mainstream of modern medical practice.
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Mainstream
TO place (a student) in regular school classes; - used especially of mentally or physically handicapped children.
Mainstream
The prevailing current of thought;
His thinking was in the American mainstream