function Copy link Outline 1. offĭcium (special work)2. mūnus (task, responsibility)3. actio (lawful course of procedure on the part of a magistrate)4. pars, partes • function: 1. offĭcium (special work): the f. of body (matter), of. corporis, Lucr. 1, 337: the f. of an orator, of. oratoris, Cic. de Or. 1, 31, 138: v. duty. 2. mūnus (task, responsibility): a lofty f., grande m., Hor. Od. 2, 1, 11. In pl., mūnia, only in nom. and acc., occurs in same sense: to fulfil the f.s of a leader, m. ducis implere, Tac. H. 1, 62: Cic.: Liv. 3. actio (lawful course of procedure on the part of a magistrate): a consular f., Liv. 4, 55, init. 4. pars, partes: v. past, province.