What is defined as a quality or characteristic that belongs to a person?

The term that is defined as a quality or characteristic that particularly belongs to a person is "attribute." An attribute refers to a distinguishing characteristic, trait, or property of an individual that signifies their nature or essence. It encompasses both innate and acquired qualities that define one's identity, such as personality traits, skills, or even physical characteristics.

While "trait" is also a similar term and can refer to specific qualities or characteristics, it is often used in the context of psychology to describe enduring patterns of behavior or predispositions rather than the broader concept of attributes. "Feature" generally refers to a distinctive property or aspect of something and may not specifically pertain to individuals. "Quality," while it can encompass a range of meanings related to characteristics, is not as precisely defined in the context of personal identity as "attribute" is. Thus, "attribute" is the most accurate term for describing a quality or characteristic unique to a person.