If one group of people has supremacy over another group, they have more political or military power than the other group.
The conservative old guard had re-established its political supremacy.
这位保守派的老卫士已重新建立起其政治上的支配地位。
If someone or something has supremacy over another person or thing, they are better.
In the United States Open final, Graf retained overall supremacy.
在美国网球公开赛的决赛中,格拉芙始终保持着优势。