It's widely (mistaken use...) used as the meaning of normal, earthly, to distinct regular person from
why is it a mistake... since time has changed the meaning of this word ... misunderstanding the meaning of WORLD or EARTH as Regular or Not Special
.... making us a "Regular" and everything
else is : Special
in a good way... or a better than the "mundane" one...
Mundane means the world... and the world is everything
but "Regular" the world/earth(and
all the rest...) is incredible... we haven't even
started to understand it ... let alone tag it as something
less than anything... etc.