I.v. a., to make round, to round off (postAug.).
B. Trop.: “enthymemata sua gestu velut corrotundant,” Quint. 11, 3, 102.—*
II. Transf., of money (cf. rotundo, and our phrase, a round sum), to make up a sum of money: “centies sestertium,” Petr. 76, 8.