Is Mundanity A Real Word?

Is Mundanity A Real Word? noun, plural mun·dan·i·ties. the condition or quality of being mundane; mundaneness. an instance of being mundane: one of the mundanities of everyday life. What does Mondaine mean? : a woman belonging to fashionable society : woman of the world : sophisticate all the barbershop roués and millinery-parlor mondaines— Sinclair Lewis.