A.sitting with in council, of persons, Hdt.3.34, Ps.-E.IA192 (lyr.); ἐκ . . συνέδρου καὶ τυραννικοῦ κύκλου, = ἐκ κύκλου τῶν συνεδρευόντων τυράννων, S.Aj.749.
2. of birds, sitting together, friendly, Arist.HA608b29.
II. as Subst., ς., ὁ, ἡ, one who sits with others, assessor, coadjutor, “Δίκη ξ. Ζηνὸς . . νόμοις” S.OC1382; ξύνεδροι select commissioners, Th.4.22, cf. 5.86, SIG273.2 (Milet., iv B.C.), IG22.686.5 (iii B.C.); delegates to the assembly of the second Athenian league, ib.43.44 (iv B.C.), al., Isoc.8.29, Jusj. ap. D.24.150.