to rule over by right of authority: to govern a nation.
2.
to exercise a directing or restraining influence over; guide: the motives governing a decision.
3.
to hold in check; control: to govern one's temper.
4.
to serve as or constitute a law for: the principles governing a case.
5.
Grammar. to be regularly accompanied by or require the use of (a particular form). In They helped us, the verbhelped governs the objective case of the pronoun we.
6.
to regulate the speed of (an engine) with a governor.
c.1300, from O.Fr. governer "govern," from L. gubernare "to direct, rule, guide," originally "to steer," from Gk. kybernan "to steer or pilot a ship, direct" (the root of cybernetics). The -k- to -g- sound shift is perhaps via the medium of Etruscan.