Lewis Short
(adjective) : grĕgārĭus, a, um, id.
* Of or belonging to a flock or herd.
* Lit.: gregariorum pastorum disciplinam repudiasse,Col. 6 praef. § 1.
* Transf., in gen., of the common sort, common (most freq. in milit. lang.): milites, common soldiers, privates, in opp. to the officers: id etiam gregarii milites faciunt inviti, ut, etc.,Cic. Planc. 30, 72; Sall. C. 38, 6; Curt. 7, 2; and in sing.: miles,Liv. 42, 34, 5; Tac. H. 5, 1: eques,id. ib. 3, 51: gregariam militiam sortitus,Just. 22, 1.—Rarely beyond the milit. sphere: poëta,Sid. Ep. 9, 15.
Charlton T. Lewis, Charles Short, A Latin Dictionary