What is a cultural trait that is specific to a single society called?

A cultural trait that is specific to a single society is referred to as particularity. This term captures the unique aspects, customs, beliefs, and practices that define a certain culture and are not shared with or found in other societies. For instance, specific rituals, festivals, or art forms that are unique to one culture exemplify particularity.

In contrast, universality refers to traits or practices that are widespread across multiple cultures, suggesting a shared human experience. Generality implies cultural traits that may be common to several societies but are not unique to any particular one. Tradition, while relevant in describing practices passed down through generations, does not necessarily indicate the exclusivity of those practices to a single culture. Thus, particularity is the term that most accurately describes a cultural trait confined to one society.