in 1 Kings 22:47, means a prefect; one set over others
In Acts 13:7-8, 12; 18:12, it denotes a proconsul; i.e., the governor of a Roman province holding his appointment from the senate. The Roman provinces were of two kinds, (1) senatorial and (2) imperial. The appointment of a governor to the former was in the hands of the senate, and he bore the title of proconsul (Greek: anthupatos). The appointment of a governor to the latter was in the hands of the emperor, and he bore the title of propraetor (Greek: antistrategos).