Arcane vs. Mundane — What's the Difference?

Known or understood by only a few

In subcultural and fictional uses, a mundane is a person who does not belong to a particular group, according to the members of that group; the implication is that such persons, lacking imagination, are concerned solely with the mundane: the quotidian and ordinary. The term first came into use in science fiction fandom to refer, sometimes deprecatingly, to non-fans; this use of the term antedates 1955.

Understood by only a few.

Lacking interest or excitement; dull

(by extension) Obscure, mysterious.

Of this earthly world rather than a heavenly or spiritual one

Requiring secret or mysterious knowledge to understand.

Of, relating to, or typical of this world; secular.

Extremely old (e.g. interpretation or knowledge), and possibly irrelevant.

Relating to, characteristic of, or concerned with commonplaces; ordinary.

Hidden; secret.

Worldly, earthly, profane, vulgar as opposed to heavenly.

Requiring secret or mysterious knowledge;

Pertaining to the Universe, cosmos or physical reality, as opposed to the spiritual world.

Ordinary; not new.

Tedious; repetitive and boring.

An unremarkable, ordinary human being.

A person considered to be "normal", part of the mainstream culture, outside the subculture, not part of the elite group.

A person who is not a Satanist.

The world outside fandom; the normal, mainstream world.

Of or pertaining to the world; worldly, as contrasted with heavenly; earthly; terrestrial; as, the mundane sphere; mundane concerns.

Commonplace; ordinary; banal.

Found in the ordinary course of events;

Concerned with the world or worldly matters;

Belonging to this earth or world; not ideal or heavenly;