1. (国家)具有独立主权的
    A sovereign state or country is independent and not under the authority of any other country.

sovereign在线翻译

    e.g. Lithuania and Armenia signed a treaty in Vilnius recognising each other as independent sovereign states...
           立陶宛和亚美尼亚在维尔纽斯签订条约，承认彼此为独立主权国家。
    e.g. The Russian Federation declared itself to be a sovereign republic.
           俄罗斯联邦宣布自己为主权独立的共和国。

2. (人、机构等)拥有最高统治权的
    Sovereign is used to describe the person or institution that has the highest power in a country.

sovereign的反义词

    e.g. Sovereign power will continue to lie with the Supreme People's Assembly.
           最高统治权仍然掌握在最高人民会议手中。

3. 最高统治者;君主;元首
    A sovereign is a king, queen, or other royal ruler of a country.

    e.g. In March 1889, she became the first British sovereign to set foot on Spanish soil.
           1889 年 3 月，她成为第一位踏上西班牙领土的英国君主。