Ascertained; precise; identified; definitive; clearly known; unambiguous; or, in law, capable of being identified or made known, without liability to mistake or ambiguity, from’ data already given. Cooper v. Bigly, 13 Mich. 479; Losecco v. Gregory, 108 La. 648, 32 South. 986; Smith v. Fyler, 2 Hill (N. Y.) 649; Civ. Code La. 1900, art 3556. Certain services. In feudal and old English law. Such services as were stinted (limited or defined) in quantity, and could not be exceeded on any pretense; as to pay a stated annual rent, or to plow such a field tor three days. 2 Bl. Comm. 61.