govern (Verb) — Bring into conformity with rules, principles or usage; impose regulations. ex. "We cannot govern the way people dress"
govern (Verb) — Direct or strongly influence the behaviour of. ex. "His belief in God governs his conduct"
govern (Verb) — Exercise authority over; as of nations. ex. "Who is governing the country now?"
govern (Verb) — Require to be in a certain grammatical case, voice, or mood. ex. "most transitive verbs govern the accusative case in German"
govern (Verb) — Determine; be able to change. ex. "rooms are equipped with air conditioning system to govern the temperature"