Lewis & Short

col-lēga (conl-), ae, m. [1. lego].

  1. I. Lit., one who is chosen at the same time with another: collegae, qui una lecti, Varr. L. L. 6, § 66 Müll.
    Hence,
    1. B. Esp., a partner in office, a colleague (freq. and class.): bis una consules, collegae in censurā, Cic. Lael. 11, 39: Pericles cum haberet collegam in praeturā Sophoclem, id. Off. 1, 40, 144: in consulatu, Plin. 19, 8, 45, § 156: consulatūs, Vell. 2, 56, 4: habere, Cic. Phil. 2, 34, 85: ibi M. Marcellum, conlegam nostrum, conveni, Serv. ap. Cic. Fam. 4, 12, 1 sq.; Hor. S. 1, 6, 40: dare alicui, Nep. Alcib. 3, 1; 7, 1: esse alicui, Tac. H. 3, 66: se consulatui ejus destinavit, id. A. 2, 42.
  2. II. Transf., of an associate in other than official position, a colleague, associate, companion, fellow: Metrodorus, Epicuri collega sapientiae, Cic. N. D. 1, 40, 114; a fellow-member of a club or sodalitia, Cic. Sull. 2, 7; a joint-guardian, Dig. 26, 7, 13 and 45; fellow-slaves, Plaut. As. 3, 2, 10 and 30; a fellow-actor, Juv. 8, 197; joint-heirs, Dig. 27, 1, 41; 42 and 46 al.