To exercise a directing or restraining power over; control or guide: used of any exertion of controlling force, whether physical or moral.Specifically To rule or regulate by right of authority; control according to law or prescription; exercise magisterial, official, or customary power over: as, to govern a state, a church, a bank, a household, etc.In grammar, to cause or require to be in a particular form: as, a transitive verb or a preposition governs a noun or pronoun in the objective case; the possessive case is governed by the thing possessed; the subject governs the verb in number and person.To exercise or have control; practise direction or guidance; especially, to exercise legal or customary authority.