Lewis & Short

fŭgĭtīvārĭus, ii, m. [fugitivus].

  1. I. One employed to catch and bring back fugitive slaves, a slave-catcher, Flor. 3, 19, 7; Dig. 19, 5, 18.
    1. B. Transf.: (cochleae) aquā finiendae, ne fugitivarius sit parandus, that they may not crawl away, Varr. R. R. 3, 14, 1.
  2. II. A concealer of runaway slaves, Cod. Th. 10, 12, 1.