A more thorough explanation:

Definition: An alienor is a person who transfers or conveys property to another. They are also known as disponors.

Example: John sold his car to Jane. In this transaction, John is the alienor because he transferred the ownership of the car to Jane.

Explanation: The example illustrates the definition of alienor by showing how John, the owner of the car, transferred the ownership to Jane, the buyer. John is the alienor because he conveyed the property (the car) to Jane.