UBERRIMA FIDES. Perfect good faith; abundant good faith.

2. This phrase is used to express that a contract must be made in perfect good faith, concealing nothing; as in the case of insurance, the insured must observe the most perfect good faith towards the insurer. 1 Story, Eq. Jur. §317; 3 Kent, Com. 283, 4th ed.

UKAAS, or UKASE. The name of a law or ordinance emanating from the czar of Russia.

ULLAGE, com. law. When a cask is gauged, what it wants of being full is called ullage.

ULTIMATUM. The last proposition made in making a contract, a treaty, and the like; as, the government of the United States has given its ultimatum, has made the last proposition it will make to complete the proposed treaty. The word also means the result of a negotiation, and it comprises the final determination of the parties concerned in the object in dispute.

ULTIMUM SUPPLICIUM. The last or extreme punishment; the penalty of death.

ULTIMUS HAERES. The last or remote heir; the lord. So called in contra-dis-tinction to the haeredes proximus, (q. v.) and the haeredes remotiores. (q. v.) Dalr Feud. Pr. 110.

UMPIRAGE. The decision of an umpire. This word is used for the judgment of an umpire, as the word award is employed to designate that of arbitrators.

UMPIRE. A person selected by two or more arbitrators. When they are authorize to do so by the submission of the parties, and they cannot agree as to the subject-matter referred to them, whose duty it is to decide the matter in dispute. Sometimes the term is applied to a single arbitrator, selected by the parties themselves. Kyd on Awards, 6, 75, 77 Caldw. on Arb. 38; Dane's Ab. Index, h. t.; 3 Vin. Ab. 93; Com. Dig. Arbitrament, F; 4 Dall. 271, 432; 4 Sco. N. S. 378; Bouv. Inst. Index, h. t.