To hold royal office; to rule as monarch

राज करना

English Usage: The queen reigns over the kingdom with grace.

Hindi Usage: रानी अपने राज्य परGrace के साथ राज करती है।

The period during which a sovereign rules

राज

English Usage: The reign of the king lasted for two decades.

Hindi Usage: राजा का राज दो दशकों तक चला।