Definition of Fidei commissum
In the civil law, a species of trust; being a gift of property (usually by will) to a person, accompanied by a request or direction of the donor that the recipient will transfer the property to another, the latter being a person not capable of taking directly under the will or gift. Elements of "fidei commissum” are that donee or legatee is invested with title and charged or directed to convey it to another or to make particular disposition of it. Succession of Abraham, La.App., 136 So.2d 471, 478.
That's the definition of Fidei commissum in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.