A more thorough explanation:

Definition: Usuary (yoo-zhoo-er-ee) is a legal term that refers to a person who has the use (usus) of a thing to satisfy personal and family needs. In Roman law, this person is also known as a usuarius.

Example: In a trust, the beneficiary who receives the income from the trust assets is considered the usuary.

Explanation: The usuary is the person who benefits from the use of a particular thing, such as the income from a trust. In this example, the beneficiary receives the income from the trust assets, but does not own the assets themselves. The beneficiary is considered the usuary because they have the right to use the income to satisfy their personal and family needs.