A "Fundamental Property" refers to a basic characteristic or quality that defines an object or system. In physics, for example, fundamental properties can include mass, charge, and spin, which are essential for understanding the behavior of particles like electrons and protons. These properties are intrinsic and do not change regardless of the object's environment. In mathematics, fundamental properties can refer to basic rules or axioms that govern a system, such as the commutative property of addition, which states that changing the order of numbers does not affect the sum. Understanding these properties is crucial for building more complex concepts in both science and mathematics.