An unremarkable, ordinary human being.
"The detective was skeptical of the mundane witness who claimed he saw nothing unusual on that rainy evening."
concerned with the world or worldly matters
"mundane affairs"
"he developed an immense terrestrial practicality"
Worldly, earthly, profane, vulgar as opposed to heavenly.
"The priest dismissed the mundane concerns of taxes and bills before turning his sermon toward divine matters."