Black's Law Dictionary (2nd edition)dictionaries

Jus Disponendi

The right of dis-posing. An expression used either general-ly to signify the right of alienation, as when we speak of depriving a married woman of the jus disponendi over her separate estate, or specially in the law relating to sales of goods, where it is often a question whether the vendor of goods has the lntentlon of reservlng to himself the jus disponendi; i. e., of preventing the ownership from passing to the purchaser, notwithstanding that he (the vendor) has parted with the possession of the goods. Sweet

Source: Black’s Law Dictionary 2nd Ed (1910)