Definition:
ἀρχιερεύς, -έως, ὁ, [in LXX for כּ'' הָרֹאשׁ,כּ'' הַגָּדוֹל,כּהֵן;] 1) high-priest: Mrk.2:26 14:47, al; of Christ: Heb.2:17 3:1, al. 2) In pl, chief priests, including ex-high-priests and members of high-priestly families: Mat.2:4, Mrk.8:31, al. (Cremer, 294; DCG, i, 297f; MM, see word). (AS)