Lewis & Short

stătĭōnārĭus, a, um, adj. [statio, II.], of or belonging to a post or station (jurid. Lat.): stationarii milites, soldiers stationed at a post, a kind of gendarmery instituted by Augustus for suppressing the grassatores, Suet. Aug. 32; Dig. 11, 4, 1; 11, 4, 4; 1, 12, 1 fin.
As subst.: stătĭōnārĭus, i, m.

  1. A. A postman, postmaster at a post-station, Cod. Th. 8, 5, 1.
  2. B. A police-officer, Cod. 12, 23, 1; 12, 58, 1; Cod. Th. 6, 29, 1; 8, 4, 2.