Pertaining to an empire, or to an emperor; as an imperial government; an imperial diadem; imperial authority or edict; imperial power or sway.

Royal; belonging to a monarch; as an imperial palace; imperial arts.

Pertaining to royalty; denoting sovereignty.

Commanding; maintaining supremacy; as the imperial democracy of Athens. Imperial chamber, the sovereign court of the German empire. Imperial city, a city in Germany which has no head but the emperor. Imperial diet, an assembly of all the states of the German empire.