Lewis & Short

mundĭālis, e, adj. [2. mundus], worldly, mundane (eccl. Lat.). elementa, Tert. Spect. 9: sordes, id. Anim. 54: negotia, Hier. Ep. 43, 2: historici, Sulp. Sev. Chron. 2, 14, 6.
Hence, adv.: mundĭālĭter, in the manner of the world (eccl. Lat.): vivere, Tert. Res. Carn. 46.