Meaning

adjective found in the ordinary course of events; ; ; - Anita Diamant

adjective concerned with the world or worldly matters

adjective belonging to this earth or world; not ideal or heavenly

originFrom Middle English mondeyne, from Old French mondain, from Late Latin mundānus, from Latin mundus (“world”). Compare Danish mondæn. (ordinary): Compare typologically Russian несусве́тный (nesusvétnyj) (<~ не- (ne-) + (rare) сусве́тный (susvétnyj) < свет (svet)).

Etymology from Wiktionary, CC BY-SA 3.0