Dominium
in Roman law, the right by which any one exercised control over property, and by which he was entitled to retain or alienate it at pleasure, as opsory or equitable right. Dominium diposed to a mere life interest, or possesrection, in feudal law, is the interest or superiority vested in the superior; and dominum utile is the interest or property vested in the vassal, as distinguished from that of the lord.