Properties or a property refers to the intrinsic or extrinsic qualities of objects—where an "object" may be of any differing nature, depending on the context and field — be it computing, philosophy, etc.
In philosophy, mathematics, and logic, a property is an abstraction characterizing an object.
In the performing arts, a property is any object used or touched by a performer.
In information processing, properties are qualities of objects which are transmitted and then received by observers. Generally, properties allow an observer to distinguish one object from another.