from
The Collaborative International Dictionary of English v.0.48
Supremacy \Su*prem"a*cy\, n. [Cf. F. supr['e]matie. See
{Supreme}.]
The state of being supreme, or in the highest station of
power; highest or supreme authority or power; as, the
supremacy of a king or a parliament.
[1913 Webster]
The usurped power of the pope being destroyed, the
crown was restored to its supremacy over spiritual men
and causes. --Blackstone.
[1913 Webster]
{Oath supremacy}, an oath which acknowledges the supremacy of
the sovereign in spiritual affairs, and renounced or
abjures the supremacy of the pope in ecclesiastical or
temporal affairs. [Eng.] --Brande & C.
[1913 Webster]