Lat. In Romanlaw. The Jegal relation existing between two tertain persons whereby one (the creditor) is authorized to demand of the other (the debtor) a certain performance which has a money value. In this sense odligatio signifies not only the duty of the debtor, but also the right of the creditor. The fact establishing such claim and debt, as also the instrument evidencing it, is termed “obligation.” Mackeld. Rom. Law,. § 360.