To act as a flagship for.
The most important one out of a related group.
The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag.
The ship regarded as most important out of a group, e.g. a nation's navy or company's fleet.
To reign over (a country)
To exercise sovereign power, to rule as a monarch.
To be a dominant quality of a place or situation; to prevail, predominate, rule.
To be the winner of the most recent iteration of a competition.
The exercise of sovereign power.
The territory or sphere over which a kingdom; empire; realm; dominion, etc. is ruled.
The period during which a monarch rules.