from G756; (properly abstract) a commencement, or (concretely) chief (in various applications of order, time, place, or rank):--beginning, corner, (at the, the) first (estate), magistrate, power, principality, principle, rule.
beginning, origin
the person or thing that commences, the first person or thing in a series, the leader
that by which anything begins to be, the origin, the active cause