Definitions for "Demimonde"
Persons of doubtful reputation; esp., women who are kept as mistresses, though not public prostitutes; demireps.
a class of woman not considered respectable because of indiscreet or promiscuous behavior
literally, from the French, "half-world." This term referred to the class of women who were considered glamorous and might even be rich, such as actresses, but were far from respectable. Usually used in connection with the high-priced courtesans who served the wealthy; these women were individually referred to as demimondaines or demireps.