χιλίαρχος (in Hdt., al., -ης), -ου, ὁ
(< χίλιοι, ἄρχω) [in LXX chiefly for אֶלֶףשַׂר;]
a chiliarch, the commander of a thousand, esp. a Roman military tribune, the commander of a cohort: Jo 18:12, Ac 21:31-33, 3722:24-2923:10, 15, 17-19, 2224:7, 2225:23; more generally, of officers of similar rank, Mk 6:21, Re 6:1519:18 (v., DB, i, 352b; DCG, i, 271a, 307a).†