Latin: In Roman law. The solum italicum (an extension of the old Agar Romanus) admitted full ownership, and of the application to it of usucapio; whereas the solum provinciale (an extension of the old Ager Publicus) admitted of a possessory title only, and of longi tempotis possessio only. Justinian abolished all distinctions between the two, sinking the italicum to the level of the provinciale. Brown. Solum rex hoo non facere potest, quod non potest injuste agere. 11 Coke, 72. This alone the king cannot do, he cannot act unjustly. Solus Dons facit hssredem, non homo Co. Litt. 5. God alone makes the heir, not-man.