res nullius in English dictionary res nullius Meanings and definitions of "res nullius" (law) Something that has no owner, and not subject to jurisdiction of any state, susceptible to national appropriation. Phrase (law) Something that has no owner, and not subject to jurisdiction of any state, susceptible to national appropriation. more Sample sentences with "res nullius" Declension Stem Match words all exact any Try again Available translations Arabic Chinese Czech French German Spanish Tamil Authors