Mundane vs. Quotidian — What's the Difference?

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.

Everyday; commonplace

Lacking interest or excitement; dull

Recurring daily. Used especially of attacks of malaria.

Of this earthly world rather than a heavenly or spiritual one

(medicine) Recurring every twenty-four hours or (more generally) daily (of symptoms, etc).

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

Happening every day; daily.

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

Having the characteristics of something which can be seen, experienced, etc, every day or very commonly; commonplace, ordinary, mundane.

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

A fever which recurs every day; quotidian malaria.

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

A daily allowance formerly paid to certain members of the clergy.

Ordinary; not new.

(usually with definite article) Commonplace or mundane things regarded as a class.

Tedious; repetitive and boring.

Occurring or returning daily; as, a quotidian fever.

An unremarkable, ordinary human being.

Anything returning daily; especially (Med.), an intermittent fever or ague which returns every day.

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

Found in the ordinary course of events;

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;