It is one of the elements of the right of ownership of a good, the complement of which is bare ownership.
The holding of the usufruct confers on its holder the right to use a good owned by another person and to reap the fruits (to receive rents for example), but not to dispose of it (for example to sell), which belongs to the bare owner. On the other hand, the usufructuary can dispose of his own right, i.e., he can assign his usufruct or renounce it.