In Roman law. A species of equitable title to things, as distinguished from a title acquired according to the strict forms of the municipal law ; the property of a Roman citizen in a subject capable of quiritary property, acquired by a title not known to the civil law, but introduced by the prretor, and protected by his impcrium or supreme executive power , e. g., where res mancipi had been transferred by mere tradition. Poste’s Gaius Inst 187. See QUIRITARIAN OWNERSHIP .