Mondain is a word with applications in today’s times, though the word has been around since the 1830’s. The word is used to describe certain people and it can be used as either a noun or an adjective.
This word is a reference to a fashionable man or one who is worldly. There is an indication that this applies equally well to fashionable or worldly women, too.
That is to say that if a person strives toward outward appearances and fashion of the times, they are mondain.
The word comes from a blend of the French word ‘mondain’, meaning socialite, and the Latin ‘mundus’, meaning ‘of the world’. That being the case, it has an extremely similar actual meaning to the word “mundane”. Mundane has the same origins.
With so many people who try so hard to be fashionable and worldly, this word definitely fits today’s society. It also lends new meaning to the term ‘mundane’.