The phrase "Belle De Nuit" is a French term that literally means "Beauty of the Night". It is often associated with flowers that bloom at night. However, there are many synonyms that can be used to describe the same concept. For instance, the term "Midnight Beauty" can be used to describe anything that is stunning, mysterious, or alluring at night. Similarly, the label "Night Queen" can be used to refer to any object or person that is the epitome of beauty during the night hours. Other synonyms that capture the same essence include "Nightlife Goddess", "Nocturnal Elegance", and "Dark Beauty".