A person's right to possess and use property to the exclusion of others is the definition of

An easement is a legal right to use another person's land for a specific purpose, such as access or utilities. It does not grant ownership or the right to exclude others from the property; rather, it allows a limited use of the property owned by someone else. Thus, it does not align with the definition of possessing and using property to the exclusion of others.

An attachment generally refers to a legal right or claim against property, often seen in the context of securing debts or obligations. It does not imply ownership or the right to use property exclusively; rather, it indicates a legal interest that may restrict the owner's rights. Therefore, it does not fit the definition in question.

Usury pertains to the illegal act of charging excessively high-interest rates on loans. This term is unrelated to property rights or ownership, as it focuses on lending practices rather than the possession and use of property. Consequently, it does not satisfy the definition provided.